热塑性聚氨酯弹性体的不同分子结构对热性能的影响  

Influence of the Molecular Structure of the Thermoplastic Polyurethanes on Their Thermal Stability

作　　者：张宝峰[1] 张敏[1] 葛正浩[1] 夏青[1] 李猛[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《材料导报（纳米与新材料专辑）》2012年第1期277-280,283,共5页

基　　金：陕西省重大科技创新项目(2009ZKC08-09);陕西省教育厅产业化培育项目(2010JC01);陕西科技大学科研创新团队项目(TD10-01)

摘　　要：制备了软段结构为聚醚型和聚酯型的两种热塑性聚氨酯弹性体(TPU),再分别以其为原料共聚和共混,制得了两种不同分子结构的TPU,并研究了其分子结构的改变对热性能的影响。研究结果表明,软段结构既有聚醚型又有聚酯型的共聚物(C-TPU)的热分解温度为331℃(热失重5%时),而它们共混得到的B-TPU的热分解温度为319℃;C-TPU的耐热性较高,并且具有较好的微相分离。Two types of thermoplastic polyurethanes（TPUs） with different molecular structures were obtained in blend and copolymerization from polyether-TPU and polyestewTPU. The thermo stability influenced by their mo lecular structures were also studied. It is indicated that the temperature of 5% mass lose of C-TPU with both po- lyether and polyester as soft segment is 331℃,while B-TPU obtained in blend 319℃. The thermal stability of C TPU was improved obviously as well as its degree of microphase separation.

关 键 词：共聚 共混 微分子结构 热性能 微相分离 

分 类 号：O614[理学—无机化学]