采用熔融二步法合成了以环氧乙烷-四氢呋喃无规共聚醚(PET)和聚己二酸乙二醇丙二酯(PEPA)的混合多元醇为软段,1,4-丁二醇(BDO)为扩链剂.不同硬段含量的异佛尔酮二异氰酸酯(IPDI)基和二环已基甲烷二异氰酸酯(HMDI)基热塑性聚氨酯弹性体(TPU).通过红外光谱(FT-IR)对TPU的结构进行了表征,利用差示扫描量热(DSC)研究了TPU的热行为,同时测试了两种TPU力学性能.结果表明,与IPDI基TPU相比,相同硬段含量的HMDI基TPU具有更高的力学强度和模量,以及更高的微相分离,同时还具有结晶的特性;IPDI基TPU中硬段与聚酯软段相互作用强于HMDI基TPU,IPDI基TPU不具备结晶特性.
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