苯甲酸乙烯酯与受电子单体的可逆加成-断链链转移共聚合

Reversible Addition-Fragmentation Chain Transfer Copolymerization of Vinyl Benzoate with Electron-withdrawing Monomers

采用二硫代苯甲酸苄酯和偶氮二异丁腈组成的引发体系 ,以可逆加成 -断链链转移聚合方法合成了苯甲酸乙烯酯与马来酸酐及N 取代马来酰亚胺的交替共聚物 .结果表明 ,所得聚合物具有预期分子量 ,分子量分布在 1.1～ 1.3之间 .在较低转化率下所得的聚合物均为交替结构 ,而与单体摩尔投料比无关 .

Reversible addition-fragmentation chain transfer (RAFT) copolymerization of vinyl benzoate (VBz) with maleic anhydride ( MAn) and N-substituted maleimides was conducted, initiated by S-benzyl dithiobenzoate/AIBN system. The results show that the polymers possess predetermined molecular weight with molecular weight distribution as narrow as 1.1 similar to 1.3. The polymers possess alternating structure regardless of the monomer feed ratio.