【摘要】 以苯乙烯（Ｓｔ）和甲基丙烯酸正丁酯（ＢＭＡ）共聚体系为例，在共聚单体敏感点组成附近做重复实验，进行了４０、６０、８０、１００、１２０℃下的低转化率的共聚合，用气相色谱测定共聚物的组成，用Ｍａｙｏ—Ｌｅｗｉｓ微分组成方程的误差变量法计算竞聚率，同时给出竞聚率的９５％可信椭圆区间。通过与ＦＴＩＲ、ＮＭＲ方法的比较，对气相色谱法测定竞聚率的准确性进行了讨论。更多还原

【Abstract】 or the system of styrene / n-butyl methacrylate / AIBN, copolymerizations were carried out at two sensitive feed monomer composition points by duplicate experiments at 40℃、60℃、80℃、100℃、120℃ respectively. The compositions of copolymers were analyzed by GC indirectly. The relative reactivity ratios of styrene and BMA system were calculated by the error-in-variables method (EVM) of Mayo-Lewis equation, and 95% joint confidence intervals of the reactivity ratios were also given. The measurement accuracy of reactivity ratios under low conversion by GC was discussed.更多还原