摘要
利用核磁共振法(NMR)测定苯乙烯和甲基丙烯酸甲酯自由基共聚合的竞聚率,并通过凝胶渗透色谱(GPC)和差示扫描量热仪(DSC)表征聚合物的相对分子质量及相对分子质量分布和玻璃化转变温度,以验证所得产物为共聚物而非2种均聚物的共混物.本实验内容丰富,综合性强,在全面培养学生实验技能的同时也能提高学生的研究能力.
Nuclear magnetic resonance(NMR) method was developed for the determination of relative reactivity ratios of styrene and methyl methacrylate free radical copolymerization. In order to verify the products as copolymers instead of polymer blends of two kinds of homopolymers,the polymer molecular weight and molecular weight distribution and the glass transition temperature were also characterized by gel permeation chromatography(GPC) and differential scanning calorimeter(DSC). This experiment was rich and systematic in content and therefore could comprehensively improve students’ experimental skills and the scientific research ability.
出处
《化学教育》
北大核心
2017年第16期38-41,共4页
Chinese Journal of Chemical Education
基金
2014年曲阜师范大学实验教改项目(SJ201404)
2016年国家大学生创新创业训练计划项目(201610446029)
关键词
自由基聚合
共聚合
竞聚率
核磁共振
综合实验
free radical polymerization
copolymerization
relative reactivity ratio
nuclear magnetic resonance
comprehensive experiment
