雷雁洲

• 1:西南交通大学 分析测试中心，四川 成都 610031

摘要(Abstract)：

以聚四氢呋喃醚二醇（PTMG）、甲苯二异氰酸酯（TDI）为原料制备了4种预聚体，分别以3，3'-二氯-4，4'-二氨基二苯基甲烷（MOCA）和2，2-双[4-（4-氨基苯氧基）苯基]六氟丙烷（BAPF）为扩链剂，制备了两个体系的热塑性聚氨酯（TPU）和含氟热塑性聚氨酯（F-TPU）。通过傅里叶转变红外光谱分析、广角X-射线衍射分析、动态流变测试绘制的Cole-Cole曲线和Han曲线，研究了体系中氟元素含量、氢键和微相分离之间的关系。通过热重分析表征了两个体系TPU的热稳定性能。结果表明，由于极强的电负性，体系中的氟原子与―CH₂―和―NH―中的氢原子形成氢键，加剧硬段和软段的相分离程度；且由于C―F键的高键能，氟元素的引入对材料热稳定性的提高有较大助益，F-TPU随着氟元素含量从w=2.7%增加到w=5.4%，起始分解温度T_5%提高了29.1℃。

关键词(KeyWords)： 含氟聚氨酯;氢键;微相分离;热稳定性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 雷雁洲

DOI: 10.3969/j.issn.1003-9015.2020.02.034

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