乳液聚合法合成高相对分子质量聚醋酸乙烯酯的研究

Study on synthesis of high molecular weight poly(vinyl acetate) using emulsion polymerization method

采用过硫酸铵/亚硫酸氢钠氧化还原体系低温引发醋酸乙烯酯乳液聚合,合成出分子量为1.07×106、分子量分布为2.75的聚醋酸乙烯酯。讨论了聚合温度、单体用量、十二烷基硫酸钠(SDS)用量、过硫酸铵用量、亚硫酸氢钠用量等因素对聚醋酸乙烯酯黏均分子量的影响,并用GPC法对其进行表征。

The emulsion polymerization of vinyl acetate using ammonium persulfate / sodium bisulfate as redox initiator was studied in this article. The effects of temperature, monomer concentration, sodium dodecyl sulfate concentration, ammonium persulfate concentration and sodium bisulfate concentration on the molecular weight of PVAc were also investigated. The high molecular weight PVAc was synthesized, whose viscosity molecular weight is 1.07i 10^6 and molecular weight disperse is 2.75 using GPC method.