摘要
以占单体摩尔量0.02%的低铜盐催化剂体系进行电子转移活化再生催化剂原子转移自由基聚合(ARGET ATRP),制备了甲基丙烯酸甲酯和丙烯酸正丁酯的6臂星形聚合物。采用凝胶渗透色谱、核磁共振氢谱和差示扫描量热分析对共聚物的相对分子质量、共聚组成和玻璃化转变行为进行了研究。将共聚物配制成涂料用树脂溶液,研究表明星形聚合物溶液黏度和对剪切力的敏感性明显低于同等相对分子质量线型聚合物。采用巯基乙醇与六臂星形共聚物进行亲核取代反应得到端羟基星形共聚物,与异氰酸酯固化剂复配得到清漆。清漆的表干时间短,基本力学性能良好,达到了丙烯酸酯面漆用要求。
Star-shaped methyl methacrylate-butyl acrylate copolymers with six arms were prepared by ARGET- ATRP using 0.02% cupric catalyst. The molecular weight, copolymerization composition and glass transition behavior were investigated by GPC, 1H-NMR and DSC. The viscosity of star-shaped copotymers solution is lower than that of linear polymer with the same molecular weight. The viscosity of star-shaped copolymers solution also exhibits less sensitivity to stress. Hydroxyl-capped star copolymers were obtained by reaction of 2-mercaptoethanol with halogen group terminated copolymers. Varnish coating film based on obtained hydroxyl-capped star copolymers was prepared by matching with isocyanurate curing agent. The coating exhibits fast tack-free behavior and good physical performance, meeting requirement of acrylate based top coating.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2016年第11期7-11,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51203014)
江苏省高校"青蓝工程"资助项目
关键词
原子转移自由基聚合
星形聚合物
黏度
高固体份涂料
atom transfer radical polymerization
star-shaped polymer
viscosity
high solids coating
