Pst－GMA大单体溶液共聚动力学及共聚物结构的研究

KINETICS OF SOLUTION COPOLYMERIZATION OF Pst-GMA MACROMER ALD STRUCTURE OF THE COPOLYMERS

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.