反式聚环戊烯橡胶合成及结构分析

对反式聚环戊烯橡胶（TPR）的合成进行实验研究，确定了催化剂制备及TPR合成工艺条件，对合成的TPR结构进行表征，结果表明：催化剂陈化后具有较高的活性及稳定性，甲苯及正己烷作为环戊烯聚合溶剂均有较好的效果。当催化剂WCl₆用量（相对于环戊烯的质量）为（2.5~3.5）×10^-6 mol/g，分子量调节剂与W物质的量的比为2~3，Al与W的物质的量比为1~3时，单体转化率大于78%，TPR反式结构含量（质量分数）约为85%，玻璃化转变温度小于-92℃，数均相对分子质量在10万~30万之间，相对分子量分布在1.5~2.5之间，满足通用胶的结构及分子量要求。

Synthesis and structure analysis of trans-polycyclopentene rubber

The synthesis of trans-polycyclopentene rubber (TPR) has been studied and the effects of varying the preparation of the tungsten-based catalyst and the polymerization conditions were investigated. The catalyst exhibited high activity and stability after aging. Toluene and n-hexane were suitable solvents for cyclopentene polymerization. When the catalyst loading was (2.5-3.5)×10^-6 molW/g monomer, the molar ratio of molecular weight regulator (n-butene)/W was 2-3 and the triisobutyl-aluminium/W ratio was 1-3, the monomer conversion rate reached a maximum of 78%, the TPR trans-structure content was about 85%, the glass transition temperature was lower than -92 ℃, the number average molecular weight was in the range 100 000-300 000 and the relative molecular mass distribution was in the range 1.5-2.5. These meet the structure and molecular weight requirements for rubber for general.