摘要
研究了甲基丙烯酸环氧丙酯封端聚苯乙烯大分子单体(Pst-GMA)与丙烯酸丁酯(BA)在苯中的溶液共聚动力学。根据理论计算和实验确定了BA的表观竞聚率(γ),发现γ值与共聚体系的粘度、Pst-GMA的分子量有关。利用Schulz程序估算了已知分子量(由改良Bruss膜渗透计测定)的共聚物的瞬时组成、平均组成、两个Pst-GMA之间BA链段长度以及共聚物分子中Pst-GMA的接枝数。
Copolymerization kinetics of hydroxylpropyl methacrylate terminated polystyrene macromonomers(M1)and butyl acrylate(M2) have been studied.The results showed that the reactivity ratio γ2 changed with the viscosity of the copolymerization solution and the molecular weight of M1. Instantaneous and cumulative copolymer compositions, average graft distributions, and grafts per molecule were calculated from Schulz programs.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第3期29-33,共5页
Polymer Materials Science & Engineering
关键词
大分子单体
共聚
反应动力学
共聚物
溶液聚合
s: macromonomers,copolymeization kinetics, reactivity ratio,composition and Structure