碲调控的可控/“活性”无皂乳液聚合反应的研究进展

Development of organotellurium-mediated controlled/“living” polymerization reaction in emulsifier-free emlusion

有机碲调控的可控/"活性"自由基聚合(TERP)较传统自由基聚合有很多优点,如可调控许多类型不同单体的聚合反应,可合成各种嵌段共聚物以及无规、接枝、星型共聚物等。该方法是将有机碲化物作为调控剂,实现对目标聚合物的分子质量、多分散性(PDI)以及聚合度等的控制。一般方法合成嵌段共聚物对单体的加入顺序具有很强的依赖性,而TERP法对单体加入的顺序并无严格要求。本文介绍了TERP法的反应机理及其在乳液聚合中的应用。

Compared with the conventional radi radical polymerization （TEtLP） has many advantag cal polymerization,the organotellurium-mediated controlled/＂living＂ es,for example,it can control many different types of monomers polymerization. In addition, various block copolymers and random, graft, star copolymers can be also synthesized using this method.The organic tellurium compounds are used as the control agents in this method, which can control the molecular weight,molecular weight distribution（PDI） and degree of the polymerization of target polymers,etc.Especially,TERP has its particular behavior in the process of block copolymer synthesis, the success of block copolymer synthesis is in general highly dependent on the order of monomer addition, while TERP was more tolerant toward the order of addition. At first the reaction mechanism of TERP is presented in this paper. Then the applications of TERP in the emulsion polymerization were introduced