GAP/PET双软段含能聚氨酯弹性体的性能

为改善聚叠氮缩水甘油醚(GAP)的性能,选用环氧乙烷/四氢呋喃共聚醚(PET),以三羟甲基丙烷(TMP)为交联剂、异佛尔酮二异氰酸酯(IPDI)为固化剂,制备了GAP/PET/TMP/IPDI双软段含能聚氨酯弹性体,采用FTIR、DSC、XRD等手段对弹性体进行了表征。实验结果表明:在催化剂含量为0.1%时,两种软段与IPDI的反应速率变化有一定差异,但能够共同形成交联网络结构;PET软段的引入使得弹性体拉伸强度提高0.9MPa,延伸率提高156%;弹性体显示出两个软段的Tg,并随两类软段含量的不同而变化。所制弹性体为非晶聚合物,183℃开始分解。

Properties of GAP/PET dual-soft segments energetic polyurethane elastomer

To improve the performance of glycidyl azide polymer(GAP),by using trimethylolpropane(TMP)as a crosslinker,isophorone diisocyanate(IPDI)as the curing agent,glycidyl azide polymer/ethylene oxide-tetrahydrofuran copolyether(PET)dual-soft segments energetic polyurethane elastomer was synthesized.The elastomer was characterized with FTIR,DSC,XRD and other means.The experimental results showed that some differences in the reaction rates of PET/IPDI and GAP/IPDI were observed at the content of catalyst was 0.1%,but PET and GAP could participate in the formation of polyurethane elastomer together.When PET was introduced in the elastomer,the tensile strength of elastomer increased by 0.9 MPa,elongation increased by 156%.The Tg of two soft segments were observed and its values changed with the content of two soft segments.GAP/PET/TMP/IPDI elastomer was an amorphous polymer and began to decompose at 183℃.