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  - 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  - 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 . .