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研究了氯乙烯 /N 苯基马来酰亚胺 (VC/PMI)共聚物组成随转化率的变化 ,体系中共聚物的累积组成偏差小于 0 0 5或 0 1的单体配比范围很小 ,采用加入第三单体丙烯腈 (AN)的方法进行改善 ,并以PMI在共聚物中的累积组成偏差作为控制参数 ,得到了PMI在共聚物中的累积组成偏差小于 0 0 5和 0 1的VC/PMIlAN较优的配比范围 .结合悬浮聚合工艺的特点 ,确定了VC/PMI/AN悬浮共聚的最佳单体配比范围为f1=0 72～ 0 84 ,f2 =0 0 2～ 0 0 4 ,f3 =0 1 2～ 0 2 4 .
The change of the composition of vinyl chloride / N-phenylmaleimide (VC / PMI) copolymer with the conversion rate was studied. The monomer with less than 0 0 5 or 0 1 in the copolymer had a small compositional ratio , The method of adding the third monomer acrylonitrile (AN) is used for improvement, and the deviation of the cumulative composition of the PMI in the copolymer is taken as the control parameter, and the cumulative composition deviation of the PMI in the copolymer is less than 0 0 5 and 0 1 The best proportion of VC / PMIlAN suspension copolymerization was determined.The optimum monomer ratio of VC / PMI / AN was determined to be f1 = 0 72 ~ 0 84, f2 = 0 0 2 ~ 0 0 4, f3 = 0 1 2 ~ 0 2 4.