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苯基聚倍半硅氧烷改性大豆油基聚氨酯的合成及其性能研究

DOI: 10.11777/j.issn1000-3304.2015.14256, PP. 290-297

Keywords: 苯基聚倍半硅氧烷,环氧大豆油,PEG-600,植物油聚氨酯,复合材料

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Abstract:

以环氧大豆油为起始原料经开环反应合成出大豆油多元醇,并与聚乙二醇(PEG-600)互混作为多元醇原料制备出植物油基聚氨酯.在预聚体合成过程中,加入不同含量的七苯基三环庚硅氧烷三硅醇,通过醇羟基与异氰酸酯基的反应,将聚倍半硅氧烷(POSS)引入到植物油聚氨酯基体中,制备出聚氨酯(PU/POSS)纳米复合材料,并探讨纳米粒子—聚倍半硅氧烷对聚氨酯材料热稳定性,表面疏水性及力学性能的影响.热重分析(TGA)结果表明,在O2条件下,复合材料的初始降解温度Td5和最终稳定温度Tf都会提高,特别是当POSS含量达到9.27wt%后,聚氨酯在450~500℃之间较强的失重现象消失;DSC结果表明玻璃化温度Tg随粒子含量的增加呈现先增大后减小的趋势;静态接触角测试结果表明随POSS含量的增加,材料表面的疏水、疏油性随之增大.拉伸测试结果表明POSS的引入能在一定程度上提高材料的拉伸强度.

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