Non-Isocyanate Poly(Siloxane-Urethanes) Based on Oligodimethylsiloxanes Containing Aminopropyl and Ethoxy Substituents

IF 1.6 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series C Pub Date : 2023-10-10 DOI:10.1134/S1811238223700406

E. S. Trankina, A. Yu. Kazantseva, D. A. Khanin, S. E. Lyubimov, E. G. Kononova, U. S. Andropova, A. M. Muzafarov

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Abstract

Environmentally friendly method for the synthesis of crosslinked poly(siloxane-urethanes) avoiding the use of toxic isocyanates has been presented. The synthesis has been performed in two stages: at the first stage, non-isocyanate poly(siloxane-urethanes) have been synthesized via aminolysis of cyclocarbonates (differing in the structure and functionality) with oligomer dimethylsiloxanes bearing aminopropyl and ethoxy substituents, and crosslinked non-isocyanate poly(siloxane-urethanes) have been obtained via hydrolysis of the ethoxy groups with air moisture. According to the TGA data, processes of thermooxidative decomposition of the non-isocyanate poly(siloxane-urethanes) begin at 240‒260°C, depending on the structure of the organic block. Structural organization of the films has been investigated and glass transition temperature of two blocks (flexible siloxane and rigid urethane ones) has been determined by means of DSC and TMA. Surface of the film samples of non-isocyanate poly(siloxane-urethanes) has been assessed by means of scanning electron microscopy.

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基于含氨基丙基和乙氧基取代基的低聚二甲基硅氧烷的非异氰酸酯聚硅氧烷聚氨酯

介绍了一种避免使用有毒异氰酸酯的环保型交联聚（硅氧烷-聚氨酯）合成方法。合成过程分为两个阶段：第一阶段，通过环碳酸酯（结构和官能度不同）与带有氨基丙基和乙氧基取代基的低聚物二甲基硅氧烷的氨解来合成非异氰酸酯聚（硅氧烷-氨基甲酸乙酯）；第二阶段，通过乙氧基在空气湿度下的水解来获得交联的非异氰酸酯聚（硅氧烷-氨基甲酸乙酯）。根据 TGA 数据，非异氰酸酯聚（硅氧烷-聚氨酯）的热氧化分解过程开始于 240-260°C 之间，具体取决于有机块的结构。对薄膜的结构组织进行了研究，并通过 DSC 和 TMA 测定了两种嵌段（柔性硅氧烷嵌段和刚性聚氨酯嵌段）的玻璃化转变温度。非异氰酸酯聚（硅氧烷-聚氨酯）薄膜样品的表面已通过扫描电子显微镜进行了评估。

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来源期刊

Polymer Science, Series C 工程技术-高分子科学

CiteScore

3.00

自引率

4.50%

发文量

审稿时长

>12 weeks

期刊介绍： Polymer Science, Series C (Selected Topics) is a journal published in collaboration with the Russian Academy of Sciences. Series C (Selected Topics) includes experimental and theoretical papers and reviews on the selected actual topics of macromolecular science chosen by the editorial board (1 issue a year). Submission is possible by invitation only. All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed