链转移作用

加入橡胶使苯乙烯聚合速率和分子量降低，橡胶起着缓聚和链转移作用。

Rubber acted as chain transfer agent and retarder at polymerization of styrene .

二是含反应性基团的单体接入聚烯烃分子链末端起链转移剂作用，这类链转移剂有硼烷、p-MS、硅烷和烷基锌等。

The other is the process in which the monomer containing " reactive group " is grafted at the end of polyolefine molecular chain , acting as a chain transfer agent , such as borane , para - methyl styrene , silane and alkyl zinc etc.

结果表明，ROK的添加使体系发生了明显的链转移反应，2G的添加对链转移有促进作用。

The results show that ROK can evidently accelerate the chain transfer reaction and 2G has some positive effect on it too .

由于种子微球上的大分子链端的碘原子可有效发挥链转移剂的作用，因此壳层单体的接枝率和接枝效率得到大幅度提高。

Iodine atoms in the end of the macromolecular chains can effectively play the role of chain transfer agent , thus , the monomer grafting and grafting efficiency was greatly improved .