固体火箭技术Issue(2)：251-255,260,6.DOI:10.7673/j.issn.1006-2793.2015.02.018
聚四氢呋喃-聚丁二烯-聚四氢呋喃三嵌段共聚物的合成与力学性能
Synthesis and mechanical properties of poly(tetrahydrofuran)-poly(butadiene)-poly(tetrahydrofuran) triblock copolymer
摘要
Abstract
Poly( tetrahydrofuran)-poly( butadiene)-poly( tetrahydrofuran) triblock copolymer was synthesized by cationic ring-opening polymerization of tetrahydrofuran in the presence of hydroxyl-terminated polybutadiene as the macroinitiator,boron trifluo-ride etherate as the catalyst, and few amount of epoxy propane as the ring-opening assistant agent. The chemical structure of target copolymers was characterized by FTIR,1 H-NMR,13 C-NMR and SEC. Triblock copolymer with a molecular weight of 8 066 g/mol was used to prepare elastomer by reacting with TDI. Tensile test indicates that the tensile strength and elongation are increased by 16% and 19% respectively compared with that of elastomer based on HTPB when both are in the same crosslink density.Dynamic mechanical analysis( DMA) reveals that the triblock copolymer cured elastomer exhibits better elasticity and viscosity properties than HTPB,and the glass transition temperature is -55.99 ℃,which is lower than HTPB cured elastomer.关键词
聚四氢呋喃-聚丁二烯-聚四氢呋喃三嵌段共聚物/合成/机械性能/开环聚合Key words
poly(tetrahydrofuran)-poly(butadiene)-poly(tetrahydrofuran) triblock copolymer/synthesis/mechanical proper-ties/ring-opening polymerization分类
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张万斌,范晓东,朱秀忠,范伟伟..聚四氢呋喃-聚丁二烯-聚四氢呋喃三嵌段共聚物的合成与力学性能[J].固体火箭技术,2015,(2):251-255,260,6.基金项目
工业和信息化部重点项目( J142011A001)。 （ J142011A001）
