TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Stefanović, Ivan
AU  - Džunuzović, Enis
AU  - Basagni, Andrea
AU  - Marega, Carla
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7662
AB  - In this paper, thermal and thermo-oxidative stability of three water-based polyurethanes (PUs) derived from hydroxypropyl
terminated poly(dimethylsiloxane) (HPT-PDMS) were studied. The structural properties of the synthesized samples were
investigated by 1H NMR measurements, while characterization of their surface, performed by atomic force microscopy,
revealed the existence of microphase-separated structures. According to the results obtained by thermogravimetric analysis
(TGA), thermo-oxidative and thermal stability of the investigated water-based PUs decreases with decreasing HPT-PDMS
content. Furthermore, obtained results also suggest that both, thermo-oxidative and thermal degradation reaction of waterbased
PUs occurred as a three-step process. In both atmospheres the first step of degradation is attributed to the degradation
of weak urethane and urea bonds and the second step to the decomposition of polysiloxane chains. In order to undertake a
detail investigation of thermal degradation process of water-based PUs, TG measurements in nitrogen atmosphere at four
different heating rates (5, 10, 15 and 20 °C/min) were performed. Different iso-conversional model-free methods, such
as Ozawa-Flynn-Wall, Kissinger-Akahira-Sunose and Friedman, were applied to determine apparent activation energy of
thermal degradation reaction (Ea) of water-based PUs, at different conversions (α). Deviation in parallelism of the obtained
fitted lines confirmed that thermal degradation reaction of water-based PUs occurred in three successive steps, followed by
different degradation mechanism. Since linear fitting of the experimental data by Friedman method had the lowest correlation
coefficient, Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods were considered to be the most reliable for Ea
calculation. A comprehensive analysis of the obtained results revealed that, despite their similar structure, each water-based
PU shows unique profile of Ea = f(α) plot.
PB  - Springer
T2  - Journal of Polymer Research
T1  - Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)
VL  - 31
SP  - 139
DO  - 10.1007/s10965-024-03982-w
ER  - 

@article{
author = "Džunuzović, Jasna and Stefanović, Ivan and Džunuzović, Enis and Basagni, Andrea and Marega, Carla",
year = "2024",
abstract = "In this paper, thermal and thermo-oxidative stability of three water-based polyurethanes (PUs) derived from hydroxypropyl
terminated poly(dimethylsiloxane) (HPT-PDMS) were studied. The structural properties of the synthesized samples were
investigated by 1H NMR measurements, while characterization of their surface, performed by atomic force microscopy,
revealed the existence of microphase-separated structures. According to the results obtained by thermogravimetric analysis
(TGA), thermo-oxidative and thermal stability of the investigated water-based PUs decreases with decreasing HPT-PDMS
content. Furthermore, obtained results also suggest that both, thermo-oxidative and thermal degradation reaction of waterbased
PUs occurred as a three-step process. In both atmospheres the first step of degradation is attributed to the degradation
of weak urethane and urea bonds and the second step to the decomposition of polysiloxane chains. In order to undertake a
detail investigation of thermal degradation process of water-based PUs, TG measurements in nitrogen atmosphere at four
different heating rates (5, 10, 15 and 20 °C/min) were performed. Different iso-conversional model-free methods, such
as Ozawa-Flynn-Wall, Kissinger-Akahira-Sunose and Friedman, were applied to determine apparent activation energy of
thermal degradation reaction (Ea) of water-based PUs, at different conversions (α). Deviation in parallelism of the obtained
fitted lines confirmed that thermal degradation reaction of water-based PUs occurred in three successive steps, followed by
different degradation mechanism. Since linear fitting of the experimental data by Friedman method had the lowest correlation
coefficient, Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods were considered to be the most reliable for Ea
calculation. A comprehensive analysis of the obtained results revealed that, despite their similar structure, each water-based
PU shows unique profile of Ea = f(α) plot.",
publisher = "Springer",
journal = "Journal of Polymer Research",
title = "Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)",
volume = "31",
pages = "139",
doi = "10.1007/s10965-024-03982-w"
}

Džunuzović, J., Stefanović, I., Džunuzović, E., Basagni, A.,& Marega, C.. (2024). Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane). in Journal of Polymer Research
Springer., 31, 139.
https://doi.org/10.1007/s10965-024-03982-w

Džunuzović J, Stefanović I, Džunuzović E, Basagni A, Marega C. Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane). in Journal of Polymer Research. 2024;31:139.
doi:10.1007/s10965-024-03982-w .

Džunuzović, Jasna, Stefanović, Ivan, Džunuzović, Enis, Basagni, Andrea, Marega, Carla, "Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)" in Journal of Polymer Research, 31 (2024):139,
https://doi.org/10.1007/s10965-024-03982-w . .

TY  - CONF
AU  - Stefanović, Ivan
AU  - Džunuzović, Jasna
AU  - Džunuzović, Enis
AU  - Basagni, Andrea
AU  - Marega, Carla
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6187
AB  - Waterborne polyurethanes (WBPUs) represent a class of polyurethanes (PUs), in which water is used as the dispersion medium, instead hazardous organic solvents. In this manner, the emission of volatile organic compounds is decreased, leading to the environmental preservation. Poly(dimethylsiloxane) (PDMS) has a lot of useful features, such as low glass transition temperature, Tg, low surface energy, excellent biocompatibility, high thermal and oxidative stability, which is why PDMS is often used in WBPU formulations. Siloxane-modified WBPUs exhibit the properties of both, PDMS and PUs. WBPUs based on PDMS have good surface properties, such as excellent hydrophobicity, chemical resistance and low surface energy. Because of these useful features, WBPUs based on PDMS can be used as coatings, adhesives, paints, etc. In this work, a series of WBPUs was synthesized via one-step polymerization method, without a chain extension step, using acetone and water as solvents and stannous octoate as a catalyst.
PB  - Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts - Second International Conference on Electron Microscopy of Nanostructures ELMINA2022, August 22nd–26th, 2022, Belgrade, Serbia
T1  - Morphology of Waterborne Polyurethanes Based on Poly(dimethylsiloxane)
SP  - 138
EP  - 139
UR  - https://hdl.handle.net/21.15107/rcub_cer_6187
ER  - 

@conference{
author = "Stefanović, Ivan and Džunuzović, Jasna and Džunuzović, Enis and Basagni, Andrea and Marega, Carla",
year = "2022",
abstract = "Waterborne polyurethanes (WBPUs) represent a class of polyurethanes (PUs), in which water is used as the dispersion medium, instead hazardous organic solvents. In this manner, the emission of volatile organic compounds is decreased, leading to the environmental preservation. Poly(dimethylsiloxane) (PDMS) has a lot of useful features, such as low glass transition temperature, Tg, low surface energy, excellent biocompatibility, high thermal and oxidative stability, which is why PDMS is often used in WBPU formulations. Siloxane-modified WBPUs exhibit the properties of both, PDMS and PUs. WBPUs based on PDMS have good surface properties, such as excellent hydrophobicity, chemical resistance and low surface energy. Because of these useful features, WBPUs based on PDMS can be used as coatings, adhesives, paints, etc. In this work, a series of WBPUs was synthesized via one-step polymerization method, without a chain extension step, using acetone and water as solvents and stannous octoate as a catalyst.",
publisher = "Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts - Second International Conference on Electron Microscopy of Nanostructures ELMINA2022, August 22nd–26th, 2022, Belgrade, Serbia",
title = "Morphology of Waterborne Polyurethanes Based on Poly(dimethylsiloxane)",
pages = "138-139",
url = "https://hdl.handle.net/21.15107/rcub_cer_6187"
}

Stefanović, I., Džunuzović, J., Džunuzović, E., Basagni, A.,& Marega, C.. (2022). Morphology of Waterborne Polyurethanes Based on Poly(dimethylsiloxane). in Program and Book of Abstracts - Second International Conference on Electron Microscopy of Nanostructures ELMINA2022, August 22nd–26th, 2022, Belgrade, Serbia
Serbian Academy of Sciences and Arts., 138-139.
https://hdl.handle.net/21.15107/rcub_cer_6187

Stefanović I, Džunuzović J, Džunuzović E, Basagni A, Marega C. Morphology of Waterborne Polyurethanes Based on Poly(dimethylsiloxane). in Program and Book of Abstracts - Second International Conference on Electron Microscopy of Nanostructures ELMINA2022, August 22nd–26th, 2022, Belgrade, Serbia. 2022;:138-139.
https://hdl.handle.net/21.15107/rcub_cer_6187 .

Stefanović, Ivan, Džunuzović, Jasna, Džunuzović, Enis, Basagni, Andrea, Marega, Carla, "Morphology of Waterborne Polyurethanes Based on Poly(dimethylsiloxane)" in Program and Book of Abstracts - Second International Conference on Electron Microscopy of Nanostructures ELMINA2022, August 22nd–26th, 2022, Belgrade, Serbia (2022):138-139,
https://hdl.handle.net/21.15107/rcub_cer_6187 .

TY  - JOUR
AU  - Stefanović, Ivan
AU  - Džunuzović, Jasna
AU  - Džunuzović, Enis S.
AU  - Brzić, Saša J.
AU  - Jasiukaityte-Grojzdek, Edita
AU  - Basagni, Andrea
AU  - Marega, Carla
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4782
AB  - A series of novel waterborne polyurethanes (WBPUs) was synthesized using α,ω-dihydroxypropyl poly(dimethylsiloxane) (PDMS), isophorone diisocyanate (IPDI), 2,2-bis-(hydroxymethyl) propionic acid (DMPA) and triethylamine (TEA). Different DMPA/PDMS molar ratio (from 0.2 to 0.7) and fixed –NCO/–OH molar ratio of 1.7, has been applied for the synthesis of six different WBPU films, without utilization of chain extension step during the synthesis. The structure of the prepared WBPUs was examined and confirmed by FTIR and NMR spectroscopy. The particle size of the prepared WBPU dispersions and molecular weight of WBPU films decrease with increasing DMPA content. In order to investigate the effect of the DMPA/PDMS ratio on thermal, mechanical and morphological properties, as well as the water resistance of the prepared WBPUs, diverse experimental techniques, such as thermogravimetric analysis, dynamic mechanical analysis, tensile tests, X-ray diffraction analysis (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water contact angle measurements have been carried out. This research has shown that the incorporation of PDMS in WBPUs led to the appearance of microphase separation and provided surface hydrophobicity, good thermal and mechanical properties, which allow application of these WBPUs as coatings for various purposes.
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane)
VL  - 161
SP  - 106474
DO  - 10.1016/j.porgcoat.2021.106474
ER  - 

@article{
author = "Stefanović, Ivan and Džunuzović, Jasna and Džunuzović, Enis S. and Brzić, Saša J. and Jasiukaityte-Grojzdek, Edita and Basagni, Andrea and Marega, Carla",
year = "2021",
abstract = "A series of novel waterborne polyurethanes (WBPUs) was synthesized using α,ω-dihydroxypropyl poly(dimethylsiloxane) (PDMS), isophorone diisocyanate (IPDI), 2,2-bis-(hydroxymethyl) propionic acid (DMPA) and triethylamine (TEA). Different DMPA/PDMS molar ratio (from 0.2 to 0.7) and fixed –NCO/–OH molar ratio of 1.7, has been applied for the synthesis of six different WBPU films, without utilization of chain extension step during the synthesis. The structure of the prepared WBPUs was examined and confirmed by FTIR and NMR spectroscopy. The particle size of the prepared WBPU dispersions and molecular weight of WBPU films decrease with increasing DMPA content. In order to investigate the effect of the DMPA/PDMS ratio on thermal, mechanical and morphological properties, as well as the water resistance of the prepared WBPUs, diverse experimental techniques, such as thermogravimetric analysis, dynamic mechanical analysis, tensile tests, X-ray diffraction analysis (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water contact angle measurements have been carried out. This research has shown that the incorporation of PDMS in WBPUs led to the appearance of microphase separation and provided surface hydrophobicity, good thermal and mechanical properties, which allow application of these WBPUs as coatings for various purposes.",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane)",
volume = "161",
pages = "106474",
doi = "10.1016/j.porgcoat.2021.106474"
}

Stefanović, I., Džunuzović, J., Džunuzović, E. S., Brzić, S. J., Jasiukaityte-Grojzdek, E., Basagni, A.,& Marega, C.. (2021). Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane). in Progress in Organic Coatings
Elsevier., 161, 106474.
https://doi.org/10.1016/j.porgcoat.2021.106474

Stefanović I, Džunuzović J, Džunuzović ES, Brzić SJ, Jasiukaityte-Grojzdek E, Basagni A, Marega C. Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane). in Progress in Organic Coatings. 2021;161:106474.
doi:10.1016/j.porgcoat.2021.106474 .

Stefanović, Ivan, Džunuzović, Jasna, Džunuzović, Enis S., Brzić, Saša J., Jasiukaityte-Grojzdek, Edita, Basagni, Andrea, Marega, Carla, "Tailoring the properties of waterborne polyurethanes by incorporating different content of poly(dimethylsiloxane)" in Progress in Organic Coatings, 161 (2021):106474,
https://doi.org/10.1016/j.porgcoat.2021.106474 . .