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Synthesis and characteristics of pectiniform polyurethane-modified polycarboxylate at room temperature

机译：室温下胶型聚氨酯改性多羧酸盐的合成及特征

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摘要

In this article, modified polyurethane prepolymer was synthesized by segmental synthesis method using isophorone diisocyanate, hydroxyl-terminated silicone, polyether glycol dimethylolpropionic acid as raw materials. After that, pectiniform polycarboxylate, of which side chains were in roughly the same polymerization degree and main chains were in different lengths, was synthesized at room temperature in initiation system of hydrogen peroxide, ascorbic acid, and persulfate. Moreover, influence of various factors on the synthesis of polyurethane-modified polycarboxylate at room temperature was discussed in detail and optimal synthesis process was determined. Results showed that redox initiation system, increasing initiator and monomer concentration, and extending reaction time needed to be adopted to complete the reaction. However, when the reaction time was over 4 h, water reducing of polycarboxylate declined rapidly. In addition, it could be found in Fourier transform infrared spectrum analysis that the CC double bonds in acrylic acid were opened and polymerized, macromolecular chain segments were successfully connected to polyoxyethylene chain segment, and resulting polycarboxylic acid molecule contained hydroxy, carboxyl, methyl, ester group, and other groups. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45873.
机译：在本文中，通过使用异佛尔酮二异氰酸酯，羟基封端的硅氧烷，聚醚二醇二羟基丙酸作为原料，通过节段合成方法合成改性聚氨酯预聚物。之后，在富含过氧化氢，抗坏血酸和过硫酸盐的引发系统中，在含有侧链的凝集性多羧酸胶质均匀的聚合度和主链具有不同的长度。此外，详细讨论了各种因素对聚氨酯改性多羧酸盐合成的影响，详细讨论了，确定了最佳合成过程。结果表明，氧化还原启动系统，增加引发剂和单体浓度，并采用延长反应时间来完成反应。然而，当反应时间超过4小时时，多羧酸盐的水还原迅速下降。此外，它可以在傅里叶变换红外光谱分析中发现，打开丙烯酸中的CC双键，成功与聚氧乙烯链段成功连接到聚氧乙烯链段，并含有多元羧酸分子含有羟基，羧基，甲基，酯小组和其他群体。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45873。

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