Template polymerization of N-vinylimidazole along poly(methacrylic acid) in water. 3. Molecular weights of the formed polymers

摘要: The molecular weights of polymers formed in the template polymerization N-vinylimidazole (VIm) along poly(methacrylic acid) (PMAA) water at 50-degrees-C using 2,2'-azobis(2-amidinopropane)-2HCl (AAP) as initiator were determined for variable [PMAA] to [VIm]0 ratios, [VIm]0, [AAP]0, and weight. Molecular up 70 times higher than those produced absence PMAA template, which is probably mainly due retardation termination radicals propagating alongside template. Longer templates appeared promote termination. Frequent radical hopping other chains on reaching ends led with 9 From a comparison corresponding rate enhancements function [PMAA]/[VIm]0, it suggested that M(v) daughter polymer was further increased by combination two template-associated (template termination), while cross-termination short possibly occlusion becomes more important [PMAA]/[VIm]0. Primary may occur because an enhanced local concentration positively charged close chains.