IPDI基和HMDI基热塑性聚氨酯弹性体的合成与性能  

Synthesis and Properties of IPDI-Based TPU and HMDI-Based TPU

作　　者：酒永斌[1] 罗运军[1] 葛震[1] 王晓青[1] 肖娟[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《高分子材料科学与工程》2011年第3期19-22,共4页Polymer Materials Science & Engineering

摘　　要：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(HM-DI)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。Isophorone diisocyanate（IPDI）-based thermoplastic polyurethane（TPU） and dicyclohexylmethane diisocyanate（HMDI）-based TPU,which used the mixtures of tetrahydrofuran-ethylene oxide copolyether（PET） and poly（ethylene-propylene adipate）（PEPA） as soft segment and 1,4-butanediol（BDO） as chain extender,were prepared by bulk polymerization.The experimental techniques utilized were Fourier transform infrared spectrum（FT-IR）,differential scanning calorimetry（DSC） and tensile testing to study the properties of the IPDI-based TPU and HMDI-based TPU.The results show that,compared with IPDI-based TPU,HMDI-based TPU has higher tensile strength and Young′s modulus its hard segment is more immiscible with the polyester of the soft segment.Also HMDI-based TPU shows better microphase separation and obvious crystalline structures in contrast to IPDI-based TPU.

关 键 词：热塑性聚氨酯 性能 异佛尔酮二异氰酸酯 二环己基甲烷二异氰酸酯 

分 类 号：TQ334.1[化学工程—橡胶工业]