PBT弹性体微相分离及对其力学性能的影响研究  

Effects of Microphase Separation on Mechanical Properties of PBT Elastomers

作　　者：左海丽 詹国柱 楼阳 黄洪勇 干效东 朱勇 ZUO Haili;ZHAN Guozhu;LOU Yang;HUANG Hongyong;GAN Xiaodong;ZHU Yong(Shanghai Space Propulsion Technology Research Institute,Huzhou 313000,Zhejiang,China)

机构地区：[1]上海航天化工应用研究所,湖州313000

出　　处：《上海航天》2018年第4期134-141,共8页Aerospace Shanghai

基　　金：国家重点基础研究发展计划(613275)

摘　　要：为了获得微相分离对宽温PBT叠氮聚醚弹性体力学性能的影响规律,用红外光谱分析法(FT-IR)和动态热力学分析法(DMA)研究了PBT叠氮聚醚弹性体产生微相分离的机理和影响因素。用调节硬段含量、交联参数的方法调控其微相分离,控制适当的微相分离程度可显著改善推进剂的力学性能。研究结果表明:在二元醇扩链的弹性体体系中,当硬段含量约为15%时,弹性体发生相对最大比例的微相分离,体现出较佳的综合力学性能。通过微相分离的调控可获得宽温范围内综合力学性能较好的叠氮聚醚推进剂用粘合剂基体材料。In order to obtain the effects of microphase separation on mechanical properties of PBT elastomers,the microphase separation mechanism and influence factors of PBT(3,3-bis(azidomethyl)oxetane and tetrahydrofuran(BAMO-THF)copolymers)are studied by Fourier transform infrared spectroscopy(FT-IR)and dynamic mechanical analysis(DMA).The results suggest that the degree of the microphase separation can be adjusted with hard segment structure and crosslinking agent content.There is the greatest scale of microphase separation in the PBT elastomer with hard segment content of 15%,which shows good mechanical properties.The mechanical properties of PBT propellant matrix can be optimized by designing microphase separation.

关 键 词：微相分离 弹性体 力学性能 叠氮聚醚推进剂 红外光谱 玻璃化转变温度 宽温 战术导弹 

分 类 号：O341[理学—固体力学]