HTPE的合成及弹性体的性能

摘要

以大分子聚乙二醇为引发剂(起始剂),三氟化硼乙醚络合物为催化剂,在少量环氧丙烷助开环的条件下,四氢呋喃发生阳离子开环聚合,直接在聚乙二醇的两端接上了聚四氢呋喃醚链段,从而制备出了一种全新结构的PTHF-PEO-PTHF端羟基三嵌段共聚醚(HTPE),采用红外光谱和核磁共振1H NMR对产物进行了表征,并以合成的HTPE为原料制备出了聚氨酯弹性体,研究了HTPE聚氨酯弹性体的力学性能和热性能.结果发现,HTPE聚氨酯弹性体不但综合力学性能较理想,而且具有玻璃化转变温度较低(T8=-69.03℃),热稳定好的特点,满足固体推进剂对粘合剂的使用要求.%Hyelroxy terminated polyether (HTPE) binder with novel structures was synthesized by ring-opening polymerization of tetrahydrofuran, using polyethylene glycot (PEC) as a macroinitiator.boron-trifuoride ethyle ther complex (BF3 · OEt2) as the catalyst,and epoxy propane(PO)asagent assistant ring-opening.