Polymerization of vinyl monomers initiated by zwitterionic polymer in aqueous solution
1993; Wiley; Volume: 30; Issue: 3 Linguagem: Inglês
10.1002/pi.4990300318
ISSN1097-0126
AutoresDer‐Jang Liaw, Kueir‐Rarn Lee,
Tópico(s)biodegradable polymer synthesis and properties
ResumoAbstract The polymerization of vinyl monomers, mainly styrene and methyl methacrylate, initiated by zwitterionic poly[3‐dimethyl(methacryloyloxy‐ethyl)ammonium propane sulfonate], [poly(DMAPS)], in aqueous solution was studied under vacuum at 85°C. An initiation mechanism involving hydrogen atom transfer is proposed. The effects of the efficiency of grafting. pH, water content and betaine polymer content on the polymerization were investigated. The conversion of vinyl monomers in poly(DMAPS) is lower than that in poly [3‐dimethyl(acryloyloxyethyl)ammonium propane sulfonate], which may be due to steric hindrance of the methyl group on the α‐carbon of the former.
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