电位分析法测定VACDMC共聚体系竞聚率

Application of Electric Potential Analysis in Mensuration of Reactivity Ratios in System of VAC/DMC Copolymerization

利用氯离子选择电极,通过电极电位随氯离子浓度的变化,测定了VAC DMC(醋酸乙烯 甲基丙烯酰氧乙基三甲基氯化铵)共聚物中PDMC链段的比例,从而计算出VAC和DMC的竞聚率分别为rVAC=0.48±0.12,rDMC=3.12±0.33,结果与元素分析法计算结果接近.

By Cl--selective electrode,when the electropotential moves with the concentration of Cl-,proportion of PDMC in copolymerization of VAC/DMC(vinylacetic acid and methacyloyloxyethyl trimethylammonium chloride) can be determined.By this,Reactivity Ratios of VAC and DMC can be calculated as:rVAC=0.48±0.12,rDMC=3.12±0.33.This method is compared with element analysis,too.