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【单选题】
以丙烯酸甲酯和氯乙烯进行自由基共聚反应,测得丙烯酸甲酯的竞聚率为 4 ,而氯乙烯的竞聚率为 0.06 ,当单体中氯乙烯 : 丙烯酸甲酯的质量比 =99:1 时,合成氯乙烯含量为 52 % 的共聚物,问欲合成氯乙烯含量为 52 % 的共聚物,共聚过程如何控制获得组成比较均一的共聚物 ______ 。A.
、必须陆续补加 丙烯酸甲酯
B.
、控制转化率，一次投料即可
C.
、必须陆续补加 氯乙烯
D.
、先补加 氯乙烯，再补加丙烯酸甲酯
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