Nikolić, Goran

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orcid::0000-0002-5589-4131
  • Nikolić, Goran (5)
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Author's Bibliography

Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine Adducts

Nikolić, Goran; Zlatković, Sasa; Cakić, Milorad; Cakić, Suzana; Lačnjevac, Časlav; Rajić, Zoran

(MDPI, BASEL, 2010)

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 . .
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Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza

Božić, Mile; Životić, Ljubomir; Nikolić, Goran; Dragović, Svetomir

(Srpsko društvo za odvodnjavanje i navodnjavanje, Akademija inženjerskih nauka Srbije, 2007)

TY  - JOUR
AU  - Božić, Mile
AU  - Životić, Ljubomir
AU  - Nikolić, Goran
AU  - Dragović, Svetomir
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6750
AB  - Nizijske površine u Vojvodini, severnom delu Srbije, na kojima je koncentrisana biljna proizvodnja, su pod uticajem nestabilnih, nepredvidivih i promenljivih padavina tokom vegetacionog perioda, naročito od juna do avgusta. U zavisnosti od intenziteta suše, prinosi kukuruza mogu biti smanjeni i do 50 % u odnosu na prinose u uslovima navodnjavanja. U ekstremno sušnim godinama to smanjenje prinosa kod kukuruza može ići i do 80 %. Na oglednom punktu lociranom na površinama Poljoprivrednog kombinata Beograd (PKB) u jugoistočnom delu Srema u priobalju reke Save ispitivane su posledice suše i efekat navodnjavanja u proizvodnji kukuruza u periodu od 2000 do 2007. Pomoću automatske meteorološke stanice mereni su klimatski parametri, na osnovu kojih je definisan intenzitet suše i utvrđivano vreme navodnjavanja. Suma padavina u vegetacionom periodu (april-septembar) iznosila je od 200 mm u 2000 godini do 650 mm u 2001. Maksimalne temperature i broj tropskih dana (preko 30(C) značajno se razlikovao po godinama, ali najveći i najduži period bio je u 2007 godini, u kojoj je i bila najoštrija suša. Zemljište na kojem su vršena ispitivanja pripada tipu humoglej, sa više od 40% čestica gline prosečne plodnosti i nepovoljnih vodno-fizičkih svojstava. Sistem za navodnjavanje zahvata oko 600 ha i koristi opremu za navodnjavanje kišenjem. Kukuruz se u sistemu gaji na oko 20% površina. Voda za navodnjavanje se koristi iz glavnog kanala za odvodnjavanje i srednjeg je kvaliteta. Vreme navodnjavanja određivano je na osnovu vodnog bilansa zemljišta, koji je obračunavan korišćenjem modela napravljenog na osnovu FAO 56 IDP. U ispitivanom periodu suša je bila izražena u 2000, 2002, 2003 i 2007 godini sa različitim intenzitetom i u različitim delovima vegetacionog perioda. Suma padavina u vegetacionom periodu iznosila je oko 50% ili manje od potreba kukuruza za vodom. Iz tog razloga, da bi se podmirile potrebe kukuruza za vodom primenjivano je navodnjavanje, kada je godišnje dodavano od 80 do 160 mm vode, u zavisnosti od intenziteta suše. Maksimalan broj dana u kojima je kukuruz bio u vodnom stresu u uslovima bez navodnjavanja iznosio je od 85 dana u 2007 do 63 u 2000 godini u kojima su navodnjavanjem date i najveće količine vode. Prinos kukuruza bez navodnjavanja iznosio je po godinama od 3.42 do 6.21 t/ha u zavisnosti od intenziteta suše. Navodnjavanjem je prinos povećan do 40% u odnosu na uslove bez navodnjavanja.
PB  - Srpsko društvo za odvodnjavanje i navodnjavanje, Akademija inženjerskih nauka Srbije
T2  - Vodoprivreda
T1  - Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza
EP  - 365
SP  - 357
VL  - 39
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6750
ER  - 
@article{
author = "Božić, Mile and Životić, Ljubomir and Nikolić, Goran and Dragović, Svetomir",
year = "2007",
abstract = "Nizijske površine u Vojvodini, severnom delu Srbije, na kojima je koncentrisana biljna proizvodnja, su pod uticajem nestabilnih, nepredvidivih i promenljivih padavina tokom vegetacionog perioda, naročito od juna do avgusta. U zavisnosti od intenziteta suše, prinosi kukuruza mogu biti smanjeni i do 50 % u odnosu na prinose u uslovima navodnjavanja. U ekstremno sušnim godinama to smanjenje prinosa kod kukuruza može ići i do 80 %. Na oglednom punktu lociranom na površinama Poljoprivrednog kombinata Beograd (PKB) u jugoistočnom delu Srema u priobalju reke Save ispitivane su posledice suše i efekat navodnjavanja u proizvodnji kukuruza u periodu od 2000 do 2007. Pomoću automatske meteorološke stanice mereni su klimatski parametri, na osnovu kojih je definisan intenzitet suše i utvrđivano vreme navodnjavanja. Suma padavina u vegetacionom periodu (april-septembar) iznosila je od 200 mm u 2000 godini do 650 mm u 2001. Maksimalne temperature i broj tropskih dana (preko 30(C) značajno se razlikovao po godinama, ali najveći i najduži period bio je u 2007 godini, u kojoj je i bila najoštrija suša. Zemljište na kojem su vršena ispitivanja pripada tipu humoglej, sa više od 40% čestica gline prosečne plodnosti i nepovoljnih vodno-fizičkih svojstava. Sistem za navodnjavanje zahvata oko 600 ha i koristi opremu za navodnjavanje kišenjem. Kukuruz se u sistemu gaji na oko 20% površina. Voda za navodnjavanje se koristi iz glavnog kanala za odvodnjavanje i srednjeg je kvaliteta. Vreme navodnjavanja određivano je na osnovu vodnog bilansa zemljišta, koji je obračunavan korišćenjem modela napravljenog na osnovu FAO 56 IDP. U ispitivanom periodu suša je bila izražena u 2000, 2002, 2003 i 2007 godini sa različitim intenzitetom i u različitim delovima vegetacionog perioda. Suma padavina u vegetacionom periodu iznosila je oko 50% ili manje od potreba kukuruza za vodom. Iz tog razloga, da bi se podmirile potrebe kukuruza za vodom primenjivano je navodnjavanje, kada je godišnje dodavano od 80 do 160 mm vode, u zavisnosti od intenziteta suše. Maksimalan broj dana u kojima je kukuruz bio u vodnom stresu u uslovima bez navodnjavanja iznosio je od 85 dana u 2007 do 63 u 2000 godini u kojima su navodnjavanjem date i najveće količine vode. Prinos kukuruza bez navodnjavanja iznosio je po godinama od 3.42 do 6.21 t/ha u zavisnosti od intenziteta suše. Navodnjavanjem je prinos povećan do 40% u odnosu na uslove bez navodnjavanja.",
publisher = "Srpsko društvo za odvodnjavanje i navodnjavanje, Akademija inženjerskih nauka Srbije",
journal = "Vodoprivreda",
title = "Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza",
pages = "365-357",
volume = "39",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6750"
}
Božić, M., Životić, L., Nikolić, G.,& Dragović, S.. (2007). Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza. in Vodoprivreda
Srpsko društvo za odvodnjavanje i navodnjavanje, Akademija inženjerskih nauka Srbije., 39, 357-365.
https://hdl.handle.net/21.15107/rcub_agrospace_6750
Božić M, Životić L, Nikolić G, Dragović S. Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza. in Vodoprivreda. 2007;39:357-365.
https://hdl.handle.net/21.15107/rcub_agrospace_6750 .
Božić, Mile, Životić, Ljubomir, Nikolić, Goran, Dragović, Svetomir, "Ublaživanje suše primenom navodnjavanja u proizvodnji kukuruza" in Vodoprivreda, 39 (2007):357-365,
https://hdl.handle.net/21.15107/rcub_agrospace_6750 .

The thermal degradation of aqueous polyurethanes with catalysts of different selectivity

Cakić, Suzana; Nikolić, Goran; Lanjevac, Aslav; Ghgorić, Miladin; Rajković, Miloš

(Elsevier Science Sa, Lausanne, 2007)

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 . .
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Thermal stability of aqueous polyurethanes depending on the applied catalysts

Cakić, Suzana; Nikolić, Goran; Lačnjevac, Časlav; Gligorić, Miladin; Stamenković, Jakov; Rajković, Miloš; Barać, Miroljub

(MDPI, BASEL, 2006)

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 . .
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Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems

Cakić, Suzana; Lačnjevac, Časlav; Nikolić, Goran; Stamenković, Jakov; Rajković, Miloš; Gligorić, Miladin; Barać, Miroljub

(MDPI, BASEL, 2006)

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 . .
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