论文部分内容阅读
为改善传统的复合推进剂端羟基黏合剂-异氰酸酯固化体系对水敏感的缺点,对端羟基聚醚黏合剂进行端基改性,将羟基转变为丙炔基,并利用点击化学原理,与多叠氮化合物组成新的推进剂黏合剂固化体系。以分子量约为4000的环氧乙烷-四氢呋喃共聚醚(PET4000)为原料,对其进行端炔基化,得到分子量约4000的端炔基PET共聚醚(C≡PET4000),在特定催化剂的作用下,与官能度为3.8的某叠氮类固化剂组成固化体系,制备不同催化剂含量和固化参数的胶片,研究了其力学性能。结果表明,端炔基聚醚-叠氮固化剂的黏合剂体系与传统的羟基黏合剂-异氰酸酯固化体系的力学性能相似。
In order to improve the traditional composite propellant hydroxyl-end adhesive - isocyanate curing system is sensitive to water shortcomings, end hydroxyl-terminated polyether adhesive terminal modification, the hydroxyl into a propynyl, and the use of click chemistry principle, and more Azide compounds constitute a new propellant binder curing system. Ethylene oxide-tetrahydrofuran copolymer (PET4000) with a molecular weight of about 4000 was alkylated to obtain an alkynyl-group PET copolyether (C≡PET4000) having a molecular weight of about 4000. The effect of the specific catalyst , And a azide curing agent with a functional degree of 3.8 to form a curing system. Films with different catalyst contents and curing parameters were prepared and their mechanical properties were studied. The results show that the mechanical properties of the alkynyl polyether-azide curing agent are similar to those of the traditional hydroxy adhesive-isocyanate curing system.