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用 1H -NMR分析法测定了丙烯酸 - β -羟乙酯 (M1)和甲基丙烯酸正丁酯 (M2 )的共聚物组成 ,用Mayo -Lewis模型的误差变量法计算出不同温度下该体系的溶液聚合的竞聚率 ,分别为r1=0 .6 3 ,r2 =1.17(6 0℃ ) ;r1=0 .6 1,r2 =1.0 1(80℃ ) ;r1=0 .6 1,r2 =0 .97(10 0℃ ) ;r1=0 .70 ,r2 =1.0 3(12 0℃ ) ;r1=0 .6 8,r2 =0 .88(140℃ )和r1=0 .6 6 ,r2 =0 .86 (16 0℃ )。根据Arrhenius方程计算获得了该体系均聚、共聚反应频率因子之比Aii/Aij和活化能之差Eii-Eij,并讨论了溶剂、氢键对共聚合单体活性的影响
The copolymer compositions of acrylic acid - β - hydroxyethyl ester (M1) and n - butyl methacrylate (M2) were determined by 1H - NMR. The error variables of the Mayo - Lewis model were used to calculate the The reactivity ratios of solution polymerization were r1 = 0.636, r2 = 1.17 (60 ℃); r1 = 0.61, r2 = 1.01 (80 ℃) 0.97 (100 ° C); r1 = 0.70, r2 = 1.03 (120 ° C); r1 = 0.68, r2 = 0.88 (140 ° C) and r1 = 0.666 = 0.86 (160 ° C). According to the Arrhenius equation, the difference between the ratio of Aii / Aij and the activation energy, Eii-Eij, of the homopolymerization and copolymerization frequency factors was calculated. The effect of solvent and hydrogen bond on the activity of the copolymerized monomer