TY  - JOUR
AU  - Cakić, Suzana M.
AU  - Ristić, Ivan S.
AU  - Marinović-Cincović, Milena
AU  - Nikolić, Nada Č.
AU  - Nikolić, Ljubiša B.
AU  - Cvetinov, Miroslav J.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1475
AB  - Novel biobased poly(ester-urethane)s (PUDs) were synthesized by solvent free homogeneous solution polymerization of poly(caprolactone) diol (PCL), castor oil-based polyols (COLs), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI) and 1,4-butane diol (BD) as the chain extender. The polyurethane dispersions were prepared by adding required amount of triethylamine (TEA) and water. In this Work, castor oil-based polyols have been synthesized using the depolymerized oligoester obtained from glycolysis of PET waste with poly(ethylene glycol) (PEG 400) and castor oil. The effects of the soft segments content on the thermal and coatings properties of resulting polyurethane films have been examined by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and measurement of the coatings properties. Phase separation of polyurethane shows a strong correlation with crystallization behaviour of the polyurethane prepared. It is established that all PUD samples containing PCL as a part soft segment with different molar ratio of castor-oil polyol are crystallisable polymers. The results from XRD analysis have showed that highest degree of crystallinity (23 and 22%) is reached in polyurethanes based on the largest content PCL diol (CPU77 and CPU73). The thermal stability of samples based on (COL/PCL molar ratio 0.25:0.75) possesses the best thermal properties but less values hardness coatings which can be ascribed to a decrease of the hard segment i.e. DMPA content in polyurethane dispersions. The long-term stability of polyurethane dispersions has been investigated using UV vis spectroscopy. The physico-mechanical properties such as hardness adhesion test and gloss of the dried films have also been determined considering the effect of soft segment content on coating properties. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Progress in Organic Coatings
T1  - Synthesis and properties biobased waterborne polyurethanes from glycolysis product of PET waste and poly(caprolactone) diol
VL  - 105
SP  - 111
EP  - 122
DO  - 10.1016/j.porgcoat.2016.10.038
ER  - 

@article{
author = "Cakić, Suzana M. and Ristić, Ivan S. and Marinović-Cincović, Milena and Nikolić, Nada Č. and Nikolić, Ljubiša B. and Cvetinov, Miroslav J.",
year = "2017",
abstract = "Novel biobased poly(ester-urethane)s (PUDs) were synthesized by solvent free homogeneous solution polymerization of poly(caprolactone) diol (PCL), castor oil-based polyols (COLs), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI) and 1,4-butane diol (BD) as the chain extender. The polyurethane dispersions were prepared by adding required amount of triethylamine (TEA) and water. In this Work, castor oil-based polyols have been synthesized using the depolymerized oligoester obtained from glycolysis of PET waste with poly(ethylene glycol) (PEG 400) and castor oil. The effects of the soft segments content on the thermal and coatings properties of resulting polyurethane films have been examined by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and measurement of the coatings properties. Phase separation of polyurethane shows a strong correlation with crystallization behaviour of the polyurethane prepared. It is established that all PUD samples containing PCL as a part soft segment with different molar ratio of castor-oil polyol are crystallisable polymers. The results from XRD analysis have showed that highest degree of crystallinity (23 and 22%) is reached in polyurethanes based on the largest content PCL diol (CPU77 and CPU73). The thermal stability of samples based on (COL/PCL molar ratio 0.25:0.75) possesses the best thermal properties but less values hardness coatings which can be ascribed to a decrease of the hard segment i.e. DMPA content in polyurethane dispersions. The long-term stability of polyurethane dispersions has been investigated using UV vis spectroscopy. The physico-mechanical properties such as hardness adhesion test and gloss of the dried films have also been determined considering the effect of soft segment content on coating properties. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Progress in Organic Coatings",
title = "Synthesis and properties biobased waterborne polyurethanes from glycolysis product of PET waste and poly(caprolactone) diol",
volume = "105",
pages = "111-122",
doi = "10.1016/j.porgcoat.2016.10.038"
}

Cakić, S. M., Ristić, I. S., Marinović-Cincović, M., Nikolić, N. Č., Nikolić, L. B.,& Cvetinov, M. J.. (2017). Synthesis and properties biobased waterborne polyurethanes from glycolysis product of PET waste and poly(caprolactone) diol. in Progress in Organic Coatings, 105, 111-122.
https://doi.org/10.1016/j.porgcoat.2016.10.038

Cakić SM, Ristić IS, Marinović-Cincović M, Nikolić NČ, Nikolić LB, Cvetinov MJ. Synthesis and properties biobased waterborne polyurethanes from glycolysis product of PET waste and poly(caprolactone) diol. in Progress in Organic Coatings. 2017;105:111-122.
doi:10.1016/j.porgcoat.2016.10.038 .

Cakić, Suzana M., Ristić, Ivan S., Marinović-Cincović, Milena, Nikolić, Nada Č., Nikolić, Ljubiša B., Cvetinov, Miroslav J., "Synthesis and properties biobased waterborne polyurethanes from glycolysis product of PET waste and poly(caprolactone) diol" in Progress in Organic Coatings, 105 (2017):111-122,
https://doi.org/10.1016/j.porgcoat.2016.10.038 . .

TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Radoman, Tijana S.
AU  - Marinović-Cincović, Milena
AU  - Nikolić, Ljubiša B.
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5322
AB  - Incorporation of surface modified TiO2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8C16). FTIR and UV-Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO2 nanoparticles in PS was achieved when the TiO2 surface was modified with octyl gallate. The presence of surface modified TiO2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo-oxidative stability of PS were significantly improved by incorporation of surface modified TiO2 nanoparticles. The most pronounced improvement of thermal and thermo-oxidative stability was observed for TiO2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013. (c) 2013 Society of Plastics Engineers
T2  - Polymer Composites
T1  - Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length
VL  - 34
IS  - 3
SP  - 399
EP  - 407
DO  - 10.1002/pc.22423
ER  - 

@article{
author = "Džunuzović, Enis S. and Džunuzović, Jasna V. and Radoman, Tijana S. and Marinović-Cincović, Milena and Nikolić, Ljubiša B. and Jeremić, Katarina B. and Nedeljković, Jovan",
year = "2013",
abstract = "Incorporation of surface modified TiO2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8C16). FTIR and UV-Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO2 nanoparticles in PS was achieved when the TiO2 surface was modified with octyl gallate. The presence of surface modified TiO2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo-oxidative stability of PS were significantly improved by incorporation of surface modified TiO2 nanoparticles. The most pronounced improvement of thermal and thermo-oxidative stability was observed for TiO2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013. (c) 2013 Society of Plastics Engineers",
journal = "Polymer Composites",
title = "Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length",
volume = "34",
number = "3",
pages = "399-407",
doi = "10.1002/pc.22423"
}

Džunuzović, E. S., Džunuzović, J. V., Radoman, T. S., Marinović-Cincović, M., Nikolić, L. B., Jeremić, K. B.,& Nedeljković, J.. (2013). Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length. in Polymer Composites, 34(3), 399-407.
https://doi.org/10.1002/pc.22423

Džunuzović ES, Džunuzović JV, Radoman TS, Marinović-Cincović M, Nikolić LB, Jeremić KB, Nedeljković J. Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length. in Polymer Composites. 2013;34(3):399-407.
doi:10.1002/pc.22423 .

Džunuzović, Enis S., Džunuzović, Jasna V., Radoman, Tijana S., Marinović-Cincović, Milena, Nikolić, Ljubiša B., Jeremić, Katarina B., Nedeljković, Jovan, "Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length" in Polymer Composites, 34, no. 3 (2013):399-407,
https://doi.org/10.1002/pc.22423 . .