合成了一种可逆加成-断裂链转移聚合(RAFT)链转移试剂S,S'-二(α,α)-甲基-α"乙酸)三硫代碳酸酯(TRIT),对以TRIT为链转移剂,苯乙烯(St)等单体室温下的紫外光引发聚合进行了研究.得到了分布比较窄的PSt(-Mw/-Mn=1.10～1.14).研究了St光聚合过程,ln[M]0/[M]随聚合时间的延长呈线性增加,分子量随转化率也呈线性增长.用FT-IR、NMR等方法对所得聚合物的结构进行了研究,结果表明,聚合物分子链中含有三硫代碳酸酯基.以合成的含有三硫代碳酸酯基的PSt-S-C(=S)-S-PSt为大分子引发剂,在相同的光聚合条件下引发丙烯酸丁酯(BA),得到了分子量分布窄的PSt-PBA-PSt三嵌段共聚物.
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