申请人:Pennwalt Corporation
公开号:US03987024A1
公开(公告)日:1976-10-19
Polyazo compounds containing at least one alkyl or aryl thia or oxa group alpha to at least one of the azo groups in the connecting chain between the azo groups, such as 4-t-butylazo-4-methyl-3-thiapentyl 4-t-butylazo-4-cyanovalerate, which are useful for the sequential generation of free radicals, especially in the preparation of block and graft copolymers.
聚偶氮化合物至少含有一个烷基或芳基硫或氧基,位于偶氮基团之间连接链的至少一个偶氮基团的α位置,例如4-t-丁基azo-4-甲基-3-硫代戊基 4-t-丁基azo-4-氰基戊酸酯,对于顺序自由基的生成特别有用,尤其是在制备块和嵌段共聚物时。