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采用氮氧稳定自由基聚合制备了苯乙烯和4-乙烯吡啶嵌段共聚物(PS-b-P4VP),聚合物的分子量及其分布以及结构分别用凝胶渗透色谱(GPC)和核磁(1H-NMR)进行了表征.并用原子力显微镜(AFM)对PS-b-P4VP增容PS/P4VP效果进行了研究.结果表明,在氮氧稳定自由基(HTEMPO·)存在下,用过氧化苯甲酰(BPO)引发苯乙烯聚合,所制备聚苯乙烯的分子量分布在1.15~1.25范围;将该聚苯乙烯溶于4-乙烯吡啶可以继续引发4-乙烯吡啶的聚合反应,共聚物的分子量分布在1.12~1.30范围.1H-NMR说明共聚物为嵌段共聚物.AFM结果说明所合成的嵌段共聚物PS-b-P4VP是PS与P4-VP的良好增溶剂.

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