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Synthesis and characterization of ammonium containing cyclocarbonates and polyurethanes there from
Reactive & Functional Polymers ( IF 5.1 ) Pub Date : 2023-11-07 , DOI: 10.1016/j.reactfunctpolym.2023.105777
Luis Miguel Nuñez Tapia , Pascal Thebault , Laurent Bischoff , Alain Ledoux , Florian Defontaine , Olivier Lesouhaitier , Fabrice Burel

Using a three steps procedure a water soluble cationic bis-cyclocarbonate was prepared. Aminolysis was attempted in water but was not successful because of rapid hydrolysis of the starting cyclocarbonate in these basic conditions. Non-isocyanate polyurethanes (linear and crosslinked) were then prepared in acetonitrile with high yields. The resulting materials exhibited good thermal properties (Tdeg > 230 °C) and Tg > 60 °C. The presence of the cationic moiety led to hydrophilic materials with swelling rate of 45% and a plastification effect was observed with Tg decreasing down to −28 °C. Further, considering ammonium characteristics, antibacterial properties were assessed. Surface adhesion test showed a 99,9% inhibition towards gram-positive and gram-negative bacteria for the polyurethane thermoset. Acute toxicity was evaluated on the bis-cyclocarbonate oligomer confirming its innocuity in the studied concentration range.



中文翻译:

含铵环碳酸酯及其聚氨酯的合成和表征

使用三步程序制备水溶性阳离子双环碳酸酯。尝试在水中进行氨解,但没有成功,因为起始环碳酸酯在这些碱性条件下快速水解。然后在乙腈中以高产率制备非异氰酸酯聚氨酯(线性和交联)。所得材料表现出良好的热性能(T deg  > 230 °C)和Tg > 60 °C。阳离子部分的存在导致亲水材料的溶胀率为 45%,并且随着 Tg 降低至 -28 °C,观察到塑化效应。此外,考虑到铵的特性,评估了抗菌性能。表面附着力测试表明,聚氨酯热固性材料对革兰氏阳性菌和革兰氏阴性菌的抑制率为 99.9%。对双环碳酸酯低聚物的急性毒性进行了评估,证实其在研究浓度范围内无毒。

更新日期:2023-11-07
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