端羟基聚丁二烯
聚丁二烯
高分子化学
聚合
材料科学
环己烷
极限抗拉强度
聚合物
摩尔质量分布
溶剂
延伸率
阴离子加成聚合
化学
共聚物
有机化学
复合材料
作者
Jiming Chen,Zaijun Lu,Guangqin Pan,Yong‐Xin Qi,Jianjun Yi,Hai-jian Bai
标识
DOI:10.1007/s10118-010-9121-y
摘要
The hydroxyl-terminated polybutadiene (HTPB) possessing high content of 1,4-units was synthesized by anionic polymerization of butadiene, using alkyllithium containing silicon-protected hydroxyl group as initiator and cyclohexane as solvent. The polymers were characterized by GPC, IR and 1H-NMR. The mechanical properties of cured films were also evaluated. The results show that the content of 1,4-units for HTPBs made by anionic polymerization reaches up to 90%. The molecular weight distribution is very narrow (≤ 1.05). The functionality of hydroxyl groups approaches 2. Compared with free radical HTPB, the elongation at break of anionic HTPB films increased by 70%, while the tensile strength remained nearly unchanged. This new HTPB can be very useful in solid propellant.
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