聚乙烯醇(PVA)在烯类单体自由基聚合反应中作为分散剂使用已有很长历史,对于PVA在不同催化体系中与烯类单体接枝聚合的研究报道也不少,其中有人报道PVA对过硫酸盐的分解具有促进作用,并可导致甲基丙烯酸甲酯在PVA大分子上接枝;也有人报道了PVA与过硫酸铵在水溶液中的相互作用,本文研究了在低浓度过 Polyvinyl alcohol (PVA) has long history of use as dispersant in the free-radical polymerization of vinyl monomers. There are also many reports on the graft polymerization of PVA with vinyl monomers in different catalytic systems. Some of them Reported that PVA has a promoting effect on the decomposition of persulfate and can lead to the grafting of methyl methacrylate on the PVA macromolecule. Some people also reported the interaction between PVA and ammonium persulfate in aqueous solution. In this paper, Too