用TMC体系催化合成反式─1，4─聚异戊二烯的研究

Synthesis of Trans- 1, 4-Polisoprene with TMC System

研究了进口ＴＭＣ体系用于合成反式－１，４－聚异戊二烯（ＴＰＩ）的聚合活性及其动力学行为。结果表明，以三异丁基铝为助催化剂，催化剂效率（ＣＥ）随着单体浓度加大，聚合温度上升和聚合时间延长而提高。当采用溶剂→单体→Ａｌ→Ｔｉ为加料顺序，以甲苯为溶剂，在Ａｌ／Ｔｉ＝５０（ｍｏｌ／ｍｏｌ），Ｔｐ＝６０℃时的最大催化剂效率可达４０００～５０００ｇＴＰＩ／ｇＴｉ。初步动力学研究表明，聚合反应速率对单体浓度呈一级反应，聚合表观活化能为３３ｋＪ／ｍｏｌ。

The kinetics of isoprene polymerization with TMC system and the catalystic activity in the Polymerization system were studied. The best value of the catalytic efficiency (CE)exceeded 4000￣5000 gTPI/gTi under the favourable conditions. The apparent activation energy of the polymerization was about 33kJ/mol.