叔丁氧基钾/正丁基锂体系合成无规丁苯橡胶的结构与性能

STRUCTURE AND PROPERTIES OF RANDOM SBR INITIATED WITH nBuLi tertBuOK

采用叔丁氧基钾＼正丁基锂为引发剂，合成出溶聚无规丁苯橡胶，用１３Ｃ－ＮＭＲ、ＩＲ、ＧＰＣ等对共聚物的序列分布及微观结构进行了表征。该体系合成的丁苯共聚物具有均匀的分子内和分子间分布。采用偶联方式，可以改善生胶的冷流现象。并考察了该体系合成无规丁苯橡胶的加工性能、力学性能、抗湿滑性和滚动损失。

he random SBR was prepared anionically with nBuLi tertBuOK as initiator in cyclohexane. Determination of the monomer sequence distribution of the copolymers and microstructure of the polybutadiene sequence was achieved by 13CNMR and IR spectroscopy. The prepared random SBR has uniform interand intramolecular composition distribution. The cold flow of raw SBR can be reduced by coupling method. The SICl4 was proved to be the most effective coupling agent. The wet skid resistance and rolling energy loss of the prepared BdSt copolymers have been investigated by examination of their dynamic mechanical properties. The prepared BdSt copolymers have good processability, mechanical properties and wet skid resistance. The abrasion loss and rolling energy loss are low.