【摘要】 采用水相悬浮沉淀聚合法,以氧化还原体系为引发剂,合成了丙烯腈(AN)与丙烯酸甲酯(MA)的共聚物.研究了单体配比、反应温度和单体浓度对聚合物平均分子量和热性能的影响,结果表明:随单体浓度的增加和第二单体比例的增加,聚合物的平均分子量呈下降趋势,反应温度的影响则较为复杂,聚合物的平均分子量呈现先增大后减小的趋势.通过熔点测定仪观测,发现聚合物的热性能与其平均分子量有密切关系.更多还原

【Abstract】 Using redox system as initiator,copolymerization of acrylonitrile(AN) and methacrylate(MA) was carried out via the method of aqueous suspension precipitation polymerization.The effects of monomer ratio、reaction temperature and monomer concentration on the average molecular weight and thermal performance of the copolymers are studied.It shows that the average molecular weight of the copolymer is decreased with increasing monomer concentration and ratio of the second monomer.It also shows that,the average molecular weight of the copolymer is increased at first and then decreased.With increasing reaction temperature,the average molecular weight of the copolymers closely relates to its thermal properties.更多还原