TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Rajković, Miloš
AU  - Rasković, Ljiljana
AU  - Stamenković, Jakov
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2538
AB  - The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT®XC-6212) and the highly selective manganese catalyst, the complex Mn (III)-diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature range of the examination was from 500C to 4500C with the heat rate of 0.50C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.
AB  - DSC metodom praćena je kinetika umrežavanja vodenih poliuretankih sistema, bez katalizatora, sa komercijalnim katalizatorom cirkonijuma (KAT®XC-6212) i visokoselektivnim manganovim katalizatorom, kompleksom Mn(III) - diacetilacetonatomaleinatom (MAM). U ovom radu za umrežavanje od poliolnih komponenti korišćene su akrilne emulzije a kao pogodni umreživači koričćeni su vodoemulgujući alifatični poliizocijanati na bazi heksametilendiizocijanata sa različitim sadržajem NCO-grupa. Na osnovu DSC-analize, metodama Kissinger-a, Freeman-Carrollaa i Crane-Ellerstein-a, određeni su prividni kinetički parametri reakcije umrežavanja vodenih sistema. Temperaturni opseg ispitivanja koričćen je od 50 do 450oC sa brzinom grejanja od 0.5oC/min. Smanjenje energije aktivacije i povećanje standardne devijacije ukazuju na katalitičko dejstvo selektivnih katalizatora cirkonijuma i mangana. Učešće katalizatora u smanjenju energije aktivacije je najveće kod katalizatora mangana, korišćenjem sve tri bbbmetode izračunavanja kod ispitivanih uzoraka u odnosu na cirkonijumov katalizator. Najmanja odsupanja između pomenutih metoda u određvanju kinetičkih parametara dobijena su korišćenjem manganovog katalizatora.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Reticulation of aqueous polyurethane systems
T1  - Proces umrežavanja vodenih poliuretanskih sistema
EP  - 48
IS  - 1
SP  - 43
VL  - 52
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2538
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Rajković, Miloš and Rasković, Ljiljana and Stamenković, Jakov",
year = "2011",
abstract = "The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT®XC-6212) and the highly selective manganese catalyst, the complex Mn (III)-diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature range of the examination was from 500C to 4500C with the heat rate of 0.50C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst., DSC metodom praćena je kinetika umrežavanja vodenih poliuretankih sistema, bez katalizatora, sa komercijalnim katalizatorom cirkonijuma (KAT®XC-6212) i visokoselektivnim manganovim katalizatorom, kompleksom Mn(III) - diacetilacetonatomaleinatom (MAM). U ovom radu za umrežavanje od poliolnih komponenti korišćene su akrilne emulzije a kao pogodni umreživači koričćeni su vodoemulgujući alifatični poliizocijanati na bazi heksametilendiizocijanata sa različitim sadržajem NCO-grupa. Na osnovu DSC-analize, metodama Kissinger-a, Freeman-Carrollaa i Crane-Ellerstein-a, određeni su prividni kinetički parametri reakcije umrežavanja vodenih sistema. Temperaturni opseg ispitivanja koričćen je od 50 do 450oC sa brzinom grejanja od 0.5oC/min. Smanjenje energije aktivacije i povećanje standardne devijacije ukazuju na katalitičko dejstvo selektivnih katalizatora cirkonijuma i mangana. Učešće katalizatora u smanjenju energije aktivacije je najveće kod katalizatora mangana, korišćenjem sve tri bbbmetode izračunavanja kod ispitivanih uzoraka u odnosu na cirkonijumov katalizator. Najmanja odsupanja između pomenutih metoda u određvanju kinetičkih parametara dobijena su korišćenjem manganovog katalizatora.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Reticulation of aqueous polyurethane systems, Proces umrežavanja vodenih poliuretanskih sistema",
pages = "48-43",
number = "1",
volume = "52",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2538"
}

Cakić, S., Lačnjevac, Č., Rajković, M., Rasković, L.,& Stamenković, J.. (2011). Reticulation of aqueous polyurethane systems. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 52(1), 43-48.
https://hdl.handle.net/21.15107/rcub_agrospace_2538

Cakić S, Lačnjevac Č, Rajković M, Rasković L, Stamenković J. Reticulation of aqueous polyurethane systems. in Zaštita materijala. 2011;52(1):43-48.
https://hdl.handle.net/21.15107/rcub_agrospace_2538 .

Cakić, Suzana, Lačnjevac, Časlav, Rajković, Miloš, Rasković, Ljiljana, Stamenković, Jakov, "Reticulation of aqueous polyurethane systems" in Zaštita materijala, 52, no. 1 (2011):43-48,
https://hdl.handle.net/21.15107/rcub_agrospace_2538 .

TY  - JOUR
AU  - Lačnjevac, Časlav
AU  - Zlatković, Sasa
AU  - Cakić, Suzana
AU  - Stamenković, J.
AU  - Rajković, Miloš
AU  - Nikolić, G.
AU  - Jelić, Sreten
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2163
AB  - The unmodified GY epoxy resin (Vantico AG) was crosslinked by the aliphatic and cycloaliphatic EH polyamine adduct (Solutia-Vianova) in the different stoichiometric ratio. The optimal time of total crosslinking was determined by indirect measuring of the film hardness. The degree of the epoxy resin crosslinking and the quantity of unreacted epoxy groups have been monitored by the spectroscopic FT-IR method. The content and intensity changes of hydroxy group were correlated to the extent of epoxy reaction and crosslinking degree. By the parameters correlation and a period of resins application, optimal resin/hardeners stoichiometric ratio was defined. It was prerequisite for three-component epoxy system forming which is comparatively more elastic, adhesion and waterproof.
PB  - IFSA Publishing, S.L.
T2  - Sensors & Transducers
T1  - New Organic Solvent Free Three-Component Waterproof Epoxy-Polyamine Systems
EP  - 103
IS  - 8
SP  - 91
VL  - 119
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2163
ER  - 

@article{
author = "Lačnjevac, Časlav and Zlatković, Sasa and Cakić, Suzana and Stamenković, J. and Rajković, Miloš and Nikolić, G. and Jelić, Sreten",
year = "2010",
abstract = "The unmodified GY epoxy resin (Vantico AG) was crosslinked by the aliphatic and cycloaliphatic EH polyamine adduct (Solutia-Vianova) in the different stoichiometric ratio. The optimal time of total crosslinking was determined by indirect measuring of the film hardness. The degree of the epoxy resin crosslinking and the quantity of unreacted epoxy groups have been monitored by the spectroscopic FT-IR method. The content and intensity changes of hydroxy group were correlated to the extent of epoxy reaction and crosslinking degree. By the parameters correlation and a period of resins application, optimal resin/hardeners stoichiometric ratio was defined. It was prerequisite for three-component epoxy system forming which is comparatively more elastic, adhesion and waterproof.",
publisher = "IFSA Publishing, S.L.",
journal = "Sensors & Transducers",
title = "New Organic Solvent Free Three-Component Waterproof Epoxy-Polyamine Systems",
pages = "103-91",
number = "8",
volume = "119",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2163"
}

Lačnjevac, Č., Zlatković, S., Cakić, S., Stamenković, J., Rajković, M., Nikolić, G.,& Jelić, S.. (2010). New Organic Solvent Free Three-Component Waterproof Epoxy-Polyamine Systems. in Sensors & Transducers
IFSA Publishing, S.L.., 119(8), 91-103.
https://hdl.handle.net/21.15107/rcub_agrospace_2163

Lačnjevac Č, Zlatković S, Cakić S, Stamenković J, Rajković M, Nikolić G, Jelić S. New Organic Solvent Free Three-Component Waterproof Epoxy-Polyamine Systems. in Sensors & Transducers. 2010;119(8):91-103.
https://hdl.handle.net/21.15107/rcub_agrospace_2163 .

Lačnjevac, Časlav, Zlatković, Sasa, Cakić, Suzana, Stamenković, J., Rajković, Miloš, Nikolić, G., Jelić, Sreten, "New Organic Solvent Free Three-Component Waterproof Epoxy-Polyamine Systems" in Sensors & Transducers, 119, no. 8 (2010):91-103,
https://hdl.handle.net/21.15107/rcub_agrospace_2163 .

TY  - JOUR
AU  - Nikolić, Goran
AU  - Zlatković, Sasa
AU  - Cakić, Milorad
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Rajić, Zoran
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2369
AB  - The use of fast FT-IR spectroscopy as a sensitive method to estimate a change of the crosslinking kinetics of epoxy resin with polyamine adducts is described in this study. A new epoxy formulation based on the use of polyamine adducts as the hardeners was analyzed. Crosslinking reactions of the different stoichiometric mixtures of the unmodified GY250 epoxy resin with the aliphatic EH606 and the cycloaliphatic EH637 polyamine adducts were studied using mid FT-IR spectroscopic techniques. As the crosslinking proceeded, the primary amine groups in polyamine adduct are converted to secondary and the tertiary amines. The decrease in the IR band intensity of epoxy groups at about 915 cm(-1), as well as at about 3,056 cm(-1), was observed due to process. Mid IR spectral analysis was used to calculate the content of the epoxy groups as a function of crosslinking time and the crosslinking degree of resin. The amount of all the epoxy species was estimated from IR spectra to changes during the crosslinking kinetics of epichlorhydrin.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts
EP  - 696
IS  - 1
SP  - 684
VL  - 10
DO  - 10.3390/s100100684
ER  - 

@article{
author = "Nikolić, Goran and Zlatković, Sasa and Cakić, Milorad and Cakić, Suzana and Lačnjevac, Časlav and Rajić, Zoran",
year = "2010",
abstract = "The use of fast FT-IR spectroscopy as a sensitive method to estimate a change of the crosslinking kinetics of epoxy resin with polyamine adducts is described in this study. A new epoxy formulation based on the use of polyamine adducts as the hardeners was analyzed. Crosslinking reactions of the different stoichiometric mixtures of the unmodified GY250 epoxy resin with the aliphatic EH606 and the cycloaliphatic EH637 polyamine adducts were studied using mid FT-IR spectroscopic techniques. As the crosslinking proceeded, the primary amine groups in polyamine adduct are converted to secondary and the tertiary amines. The decrease in the IR band intensity of epoxy groups at about 915 cm(-1), as well as at about 3,056 cm(-1), was observed due to process. Mid IR spectral analysis was used to calculate the content of the epoxy groups as a function of crosslinking time and the crosslinking degree of resin. The amount of all the epoxy species was estimated from IR spectra to changes during the crosslinking kinetics of epichlorhydrin.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts",
pages = "696-684",
number = "1",
volume = "10",
doi = "10.3390/s100100684"
}

Nikolić, G., Zlatković, S., Cakić, M., Cakić, S., Lačnjevac, Č.,& Rajić, Z.. (2010). Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts. in Sensors
MDPI, BASEL., 10(1), 684-696.
https://doi.org/10.3390/s100100684

Nikolić G, Zlatković S, Cakić M, Cakić S, Lačnjevac Č, Rajić Z. Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts. in Sensors. 2010;10(1):684-696.
doi:10.3390/s100100684 .

Nikolić, Goran, Zlatković, Sasa, Cakić, Milorad, Cakić, Suzana, Lačnjevac, Časlav, Rajić, Zoran, "Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts" in Sensors, 10, no. 1 (2010):684-696,
https://doi.org/10.3390/s100100684 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Stamenković, Jakov
AU  - Ristić, Nikola
AU  - Takić, Ljiljana
AU  - Barać, Miroljub
AU  - Gligorić, Miladin
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1539
AB  - Two kinds of aqueous acrylic polyols (single step and multi step synthesis type) have been investigated for their performance in the two-component aqueous polyurethane application, by using more selective catalysts. The aliphatic polyfunctional isocyanates based on hexamethylen diisocyanates have been employed as suitable hardeners. The complex of zirconium, commercially known as K-KAT(R)XC-6212, and manganese (III) complexes with mixed ligands based on the derivative of maleic acid have been used as catalysts in this study. Both of the aqueous polyols give good results, in terms of application and hardness, when elevated temperatures and more selective catalysts are applied. A more selective catalyst promotes the reaction between the isocyanate and polyol component. This increases the percentage of urethane bonds and the degree of hardness in the films formed from the two components of aqueous polyurethane lacquers. The polyol based on the single step synthesis route is favourable concerning potlife and hardness. The obtained results show that the performance of the two-component aqueous polyurethane coatings depends on the polymer structure of the polyols as well as on the selectivity of the employed catalyst.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Effects of the acrylic polyol structure and the selectivity of the employed catalyst on the performance of two-component aqueous polyurethane coatings
EP  - 318
IS  - 3
SP  - 308
VL  - 7
DO  - 10.3390/s7030308
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Stamenković, Jakov and Ristić, Nikola and Takić, Ljiljana and Barać, Miroljub and Gligorić, Miladin",
year = "2007",
abstract = "Two kinds of aqueous acrylic polyols (single step and multi step synthesis type) have been investigated for their performance in the two-component aqueous polyurethane application, by using more selective catalysts. The aliphatic polyfunctional isocyanates based on hexamethylen diisocyanates have been employed as suitable hardeners. The complex of zirconium, commercially known as K-KAT(R)XC-6212, and manganese (III) complexes with mixed ligands based on the derivative of maleic acid have been used as catalysts in this study. Both of the aqueous polyols give good results, in terms of application and hardness, when elevated temperatures and more selective catalysts are applied. A more selective catalyst promotes the reaction between the isocyanate and polyol component. This increases the percentage of urethane bonds and the degree of hardness in the films formed from the two components of aqueous polyurethane lacquers. The polyol based on the single step synthesis route is favourable concerning potlife and hardness. The obtained results show that the performance of the two-component aqueous polyurethane coatings depends on the polymer structure of the polyols as well as on the selectivity of the employed catalyst.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Effects of the acrylic polyol structure and the selectivity of the employed catalyst on the performance of two-component aqueous polyurethane coatings",
pages = "318-308",
number = "3",
volume = "7",
doi = "10.3390/s7030308"
}

Cakić, S., Lačnjevac, Č., Stamenković, J., Ristić, N., Takić, L., Barać, M.,& Gligorić, M.. (2007). Effects of the acrylic polyol structure and the selectivity of the employed catalyst on the performance of two-component aqueous polyurethane coatings. in Sensors
MDPI, BASEL., 7(3), 308-318.
https://doi.org/10.3390/s7030308

Cakić S, Lačnjevac Č, Stamenković J, Ristić N, Takić L, Barać M, Gligorić M. Effects of the acrylic polyol structure and the selectivity of the employed catalyst on the performance of two-component aqueous polyurethane coatings. in Sensors. 2007;7(3):308-318.
doi:10.3390/s7030308 .

Cakić, Suzana, Lačnjevac, Časlav, Stamenković, Jakov, Ristić, Nikola, Takić, Ljiljana, Barać, Miroljub, Gligorić, Miladin, "Effects of the acrylic polyol structure and the selectivity of the employed catalyst on the performance of two-component aqueous polyurethane coatings" in Sensors, 7, no. 3 (2007):308-318,
https://doi.org/10.3390/s7030308 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Rasković, Ljiljana
AU  - Lačnjevac, Časlav
AU  - Rajković, Milos
AU  - Barać, Miroljub
AU  - Stojanović, Miodrag
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1599
AB  - The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays' activity on the samples over the time periods of 240, 480 and 960 minutes directly affects the spectrum appearance of the same sample before and after the irradiation. The longer the action time of the UV rays and the higher a mass percentage of nitrocellulose in the nitrodope is, the smaller the bands' surfaces become, i. e. the level of degradation is higher. In order to confirm the degradation of nitrodope, the degree of crosslinking has also been examined by determining the Konig hardness and also the mean viscosity molar mass has been defined repeatedly applying the capillary viscosimetry method.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Physical-mechanical properties of nitrodopes affected by ultra-violet radiation
EP  - 2156
IS  - 10
SP  - 2139
VL  - 7
DO  - 10.3390/S7102139
ER  - 

@article{
author = "Cakić, Suzana and Rasković, Ljiljana and Lačnjevac, Časlav and Rajković, Milos and Barać, Miroljub and Stojanović, Miodrag",
year = "2007",
abstract = "The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays' activity on the samples over the time periods of 240, 480 and 960 minutes directly affects the spectrum appearance of the same sample before and after the irradiation. The longer the action time of the UV rays and the higher a mass percentage of nitrocellulose in the nitrodope is, the smaller the bands' surfaces become, i. e. the level of degradation is higher. In order to confirm the degradation of nitrodope, the degree of crosslinking has also been examined by determining the Konig hardness and also the mean viscosity molar mass has been defined repeatedly applying the capillary viscosimetry method.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Physical-mechanical properties of nitrodopes affected by ultra-violet radiation",
pages = "2156-2139",
number = "10",
volume = "7",
doi = "10.3390/S7102139"
}

Cakić, S., Rasković, L., Lačnjevac, Č., Rajković, M., Barać, M.,& Stojanović, M.. (2007). Physical-mechanical properties of nitrodopes affected by ultra-violet radiation. in Sensors
MDPI, BASEL., 7(10), 2139-2156.
https://doi.org/10.3390/S7102139

Cakić S, Rasković L, Lačnjevac Č, Rajković M, Barać M, Stojanović M. Physical-mechanical properties of nitrodopes affected by ultra-violet radiation. in Sensors. 2007;7(10):2139-2156.
doi:10.3390/S7102139 .

Cakić, Suzana, Rasković, Ljiljana, Lačnjevac, Časlav, Rajković, Milos, Barać, Miroljub, Stojanović, Miodrag, "Physical-mechanical properties of nitrodopes affected by ultra-violet radiation" in Sensors, 7, no. 10 (2007):2139-2156,
https://doi.org/10.3390/S7102139 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Nikolić, Goran
AU  - Lanjevac, Aslav
AU  - Ghgorić, Miladin
AU  - Rajković, Miloš
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1559
AB  - The thermal,ability of aqueous polyurethanes has been measured by applying the thermogravimetric analysis, The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05 and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5 and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes the total resulting time of the decomposition has increased at all degradation degrees and at all temperatures. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The thermal degradation of aqueous polyurethanes with catalysts of different selectivity
EP  - 116
IS  - 2
SP  - 112
VL  - 60
DO  - 10.1016/j.porgcoat.2007.07.004
ER  - 

@article{
author = "Cakić, Suzana and Nikolić, Goran and Lanjevac, Aslav and Ghgorić, Miladin and Rajković, Miloš",
year = "2007",
abstract = "The thermal,ability of aqueous polyurethanes has been measured by applying the thermogravimetric analysis, The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05 and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5 and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes the total resulting time of the decomposition has increased at all degradation degrees and at all temperatures. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The thermal degradation of aqueous polyurethanes with catalysts of different selectivity",
pages = "116-112",
number = "2",
volume = "60",
doi = "10.1016/j.porgcoat.2007.07.004"
}

Cakić, S., Nikolić, G., Lanjevac, A., Ghgorić, M.,& Rajković, M.. (2007). The thermal degradation of aqueous polyurethanes with catalysts of different selectivity. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 60(2), 112-116.
https://doi.org/10.1016/j.porgcoat.2007.07.004

Cakić S, Nikolić G, Lanjevac A, Ghgorić M, Rajković M. The thermal degradation of aqueous polyurethanes with catalysts of different selectivity. in Progress in Organic Coatings. 2007;60(2):112-116.
doi:10.1016/j.porgcoat.2007.07.004 .

Cakić, Suzana, Nikolić, Goran, Lanjevac, Aslav, Ghgorić, Miladin, Rajković, Miloš, "The thermal degradation of aqueous polyurethanes with catalysts of different selectivity" in Progress in Organic Coatings, 60, no. 2 (2007):112-116,
https://doi.org/10.1016/j.porgcoat.2007.07.004 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Nikolić, Goran
AU  - Lačnjevac, Časlav
AU  - Gligorić, Miladin
AU  - Stamenković, Jakov
AU  - Rajković, Miloš
AU  - Barać, Miroljub
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1352
AB  - The thermal stability of aqueous polyurethanes has been measured applying the thermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05, and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5, and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes, the total resulting time of the decompositon has been on the increase at all degrees of the degradation and at the particular starting temperature. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Thermal stability of aqueous polyurethanes depending on the applied catalysts
EP  - 1707
IS  - 11
SP  - 1697
VL  - 6
DO  - 10.3390/s6111697
ER  - 

@article{
author = "Cakić, Suzana and Nikolić, Goran and Lačnjevac, Časlav and Gligorić, Miladin and Stamenković, Jakov and Rajković, Miloš and Barać, Miroljub",
year = "2006",
abstract = "The thermal stability of aqueous polyurethanes has been measured applying the thermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05, and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5, and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes, the total resulting time of the decompositon has been on the increase at all degrees of the degradation and at the particular starting temperature. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Thermal stability of aqueous polyurethanes depending on the applied catalysts",
pages = "1707-1697",
number = "11",
volume = "6",
doi = "10.3390/s6111697"
}

Cakić, S., Nikolić, G., Lačnjevac, Č., Gligorić, M., Stamenković, J., Rajković, M.,& Barać, M.. (2006). Thermal stability of aqueous polyurethanes depending on the applied catalysts. in Sensors
MDPI, BASEL., 6(11), 1697-1707.
https://doi.org/10.3390/s6111697

Cakić S, Nikolić G, Lačnjevac Č, Gligorić M, Stamenković J, Rajković M, Barać M. Thermal stability of aqueous polyurethanes depending on the applied catalysts. in Sensors. 2006;6(11):1697-1707.
doi:10.3390/s6111697 .

Cakić, Suzana, Nikolić, Goran, Lačnjevac, Časlav, Gligorić, Miladin, Stamenković, Jakov, Rajković, Miloš, Barać, Miroljub, "Thermal stability of aqueous polyurethanes depending on the applied catalysts" in Sensors, 6, no. 11 (2006):1697-1707,
https://doi.org/10.3390/s6111697 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Nikolić, Goran
AU  - Stamenković, Jakov
AU  - Rajković, Miloš
AU  - Gligorić, Miladin
AU  - Barać, Miroljub
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1338
AB  - The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems
EP  - 1720
IS  - 11
SP  - 1708
VL  - 6
DO  - 10.3390/s6111708
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Nikolić, Goran and Stamenković, Jakov and Rajković, Miloš and Gligorić, Miladin and Barać, Miroljub",
year = "2006",
abstract = "The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems",
pages = "1720-1708",
number = "11",
volume = "6",
doi = "10.3390/s6111708"
}

Cakić, S., Lačnjevac, Č., Nikolić, G., Stamenković, J., Rajković, M., Gligorić, M.,& Barać, M.. (2006). Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors
MDPI, BASEL., 6(11), 1708-1720.
https://doi.org/10.3390/s6111708

Cakić S, Lačnjevac Č, Nikolić G, Stamenković J, Rajković M, Gligorić M, Barać M. Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors. 2006;6(11):1708-1720.
doi:10.3390/s6111708 .

Cakić, Suzana, Lačnjevac, Časlav, Nikolić, Goran, Stamenković, Jakov, Rajković, Miloš, Gligorić, Miladin, Barać, Miroljub, "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems" in Sensors, 6, no. 11 (2006):1708-1720,
https://doi.org/10.3390/s6111708 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Kostić-Despotović, Ljiljana
AU  - Lačnjevac, Časlav
AU  - Djordjević, Dragan
AU  - Barać, Miroljub
AU  - Rajković, Miloš
AU  - Gligorić, Miladin
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1139
AB  - The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays activity on the samples over time intervals of 240, 480 and 960 min. directly affects the spectrum appearance of the same sample before and after the radiation. The longer the UV rays activity time and the larger a mass proportion of nitrocellulose in the nitrodope is, the smaller the bands surface becomes i.e. the degree of degradation is higher. To confirm the degradation of nitrodope the degree of reticulation has also been examined by determining the König hardness.
AB  - U radu je korišćena FTIR spektroskopija za praćenje procesa fotodegradacije nitrolakova, merenjem površina traka koje su karakteristične za nitro grupu. Nitratni estri podležu degradaciji što se odražava na kvantitativni odnos površina IR traka koje potiču od nitratnog estra. Dobijeni rezultati pokazuju da dužina dejstva UV zraka na uzorke u vremenskim intervalima od 240, 480 i 960 min., direktno utiče na izgled spektra istog uzorka pre i posle zračenja. Što je duže vreme dejstva UV zraka kao i maseni udeo nitroceluloze u nitrolaku površina traka se sve više smanjuje tj.stepen degradacije je veći. Za potvrdu degradacije nitrolakova praćen je i stepen umreženosti određivanjem tvrdoće po König-u.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Monitoring the nitrodope photodegradation by FTIR spectroscopy
T1  - Praćenje fotodegradacije nitrolakova FTIR spektroskopijom
EP  - 44
IS  - 3
SP  - 39
VL  - 47
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1139
ER  - 

@article{
author = "Cakić, Suzana and Kostić-Despotović, Ljiljana and Lačnjevac, Časlav and Djordjević, Dragan and Barać, Miroljub and Rajković, Miloš and Gligorić, Miladin",
year = "2006",
abstract = "The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays activity on the samples over time intervals of 240, 480 and 960 min. directly affects the spectrum appearance of the same sample before and after the radiation. The longer the UV rays activity time and the larger a mass proportion of nitrocellulose in the nitrodope is, the smaller the bands surface becomes i.e. the degree of degradation is higher. To confirm the degradation of nitrodope the degree of reticulation has also been examined by determining the König hardness., U radu je korišćena FTIR spektroskopija za praćenje procesa fotodegradacije nitrolakova, merenjem površina traka koje su karakteristične za nitro grupu. Nitratni estri podležu degradaciji što se odražava na kvantitativni odnos površina IR traka koje potiču od nitratnog estra. Dobijeni rezultati pokazuju da dužina dejstva UV zraka na uzorke u vremenskim intervalima od 240, 480 i 960 min., direktno utiče na izgled spektra istog uzorka pre i posle zračenja. Što je duže vreme dejstva UV zraka kao i maseni udeo nitroceluloze u nitrolaku površina traka se sve više smanjuje tj.stepen degradacije je veći. Za potvrdu degradacije nitrolakova praćen je i stepen umreženosti određivanjem tvrdoće po König-u.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Monitoring the nitrodope photodegradation by FTIR spectroscopy, Praćenje fotodegradacije nitrolakova FTIR spektroskopijom",
pages = "44-39",
number = "3",
volume = "47",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1139"
}

Cakić, S., Kostić-Despotović, L., Lačnjevac, Č., Djordjević, D., Barać, M., Rajković, M.,& Gligorić, M.. (2006). Monitoring the nitrodope photodegradation by FTIR spectroscopy. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 47(3), 39-44.
https://hdl.handle.net/21.15107/rcub_agrospace_1139

Cakić S, Kostić-Despotović L, Lačnjevac Č, Djordjević D, Barać M, Rajković M, Gligorić M. Monitoring the nitrodope photodegradation by FTIR spectroscopy. in Zaštita materijala. 2006;47(3):39-44.
https://hdl.handle.net/21.15107/rcub_agrospace_1139 .

Cakić, Suzana, Kostić-Despotović, Ljiljana, Lačnjevac, Časlav, Djordjević, Dragan, Barać, Miroljub, Rajković, Miloš, Gligorić, Miladin, "Monitoring the nitrodope photodegradation by FTIR spectroscopy" in Zaštita materijala, 47, no. 3 (2006):39-44,
https://hdl.handle.net/21.15107/rcub_agrospace_1139 .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Rajković, Miloš
AU  - Rasković, Ljiljana
AU  - Stamenković, Jakov
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1348
AB  - The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Reticulation of aqueous polyurethane systems controlled by DSC method
EP  - 545
IS  - 5
SP  - 536
VL  - 6
DO  - 10.3390/s6050536
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Rajković, Miloš and Rasković, Ljiljana and Stamenković, Jakov",
year = "2006",
abstract = "The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Reticulation of aqueous polyurethane systems controlled by DSC method",
pages = "545-536",
number = "5",
volume = "6",
doi = "10.3390/s6050536"
}

Cakić, S., Lačnjevac, Č., Rajković, M., Rasković, L.,& Stamenković, J.. (2006). Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors
MDPI, BASEL., 6(5), 536-545.
https://doi.org/10.3390/s6050536

Cakić S, Lačnjevac Č, Rajković M, Rasković L, Stamenković J. Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors. 2006;6(5):536-545.
doi:10.3390/s6050536 .

Cakić, Suzana, Lačnjevac, Časlav, Rajković, Miloš, Rasković, Ljiljana, Stamenković, Jakov, "Reticulation of aqueous polyurethane systems controlled by DSC method" in Sensors, 6, no. 5 (2006):536-545,
https://doi.org/10.3390/s6050536 . .