Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)
Само за регистроване кориснике
2024
Чланак у часопису (Објављена верзија)
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© The Polymer Society, Taipei 2024
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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 water-based 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 deg...radation 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.
Кључне речи:
AFM / HPT-PDMS / Thermal stability / Thermo-oxidative stability / Water-based polyurethanesИзвор:
Journal of Polymer Research, 2024, 31, 5, 139-Издавач:
- Springer Science and Business Media B.V.
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200135 (Универзитет у Београду, Технолошко-металуршки факултет) (RS-MESTD-inst-2020-200135)
DOI: 10.1007/s10965-024-03982-w
ISSN: 1022-9760
WoS: 001217592900001
Scopus: 2-s2.0-85192466126
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Džunuzović, Jasna V. AU - Stefanović, Ivan S. AU - Džunuzović, Enis S. AU - Basagni, Andrea AU - Marega, Carla PY - 2024 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7471 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 water-based 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 Science and Business Media B.V. T2 - Journal of Polymer Research T1 - Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane) IS - 5 SP - 139 VL - 31 DO - 10.1007/s10965-024-03982-w ER -
@article{ author = "Džunuzović, Jasna V. and Stefanović, Ivan S. and Džunuzović, Enis S. 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 water-based 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 Science and Business Media B.V.", journal = "Journal of Polymer Research", title = "Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)", number = "5", pages = "139", volume = "31", doi = "10.1007/s10965-024-03982-w" }
Džunuzović, J. V., Stefanović, I. S., Džunuzović, E. S., 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 Science and Business Media B.V.., 31(5), 139. https://doi.org/10.1007/s10965-024-03982-w
Džunuzović JV, Stefanović IS, Džunuzović ES, 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(5):139. doi:10.1007/s10965-024-03982-w .
Džunuzović, Jasna V., Stefanović, Ivan S., Džunuzović, Enis S., Basagni, Andrea, Marega, Carla, "Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)" in Journal of Polymer Research, 31, no. 5 (2024):139, https://doi.org/10.1007/s10965-024-03982-w . .