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化工进展  2015 

双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA的自组装行为

DOI: 10.16085/j.issn.1000-6613.2015.03.030, PP. 784-789

Keywords: 可逆加成-断裂链转移聚合,双亲嵌段共聚物,自组装胶束,交联

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Abstract:

以三硫代碳酸二(α,α'-二甲基-α-乙酸)酯(BDATC)为链转移剂,以苯乙烯、马来酸酐、丙烯酸为原料,通过可逆加成-断裂链转移(RAFT)合成了双亲嵌段共聚物PSt-b-P(St-alt-MA)-b-PAA。通过选择性溶剂N,N-二甲基甲酰胺(DMF)诱导聚合物进行自组装,利用紫外-可见光光度仪、纳米激光粒度仪详细研究了共聚物中亲疏水嵌段长度、初始浓度、体系pH值对聚合物自组装行为的影响。通过化学交联的方法制备得到了聚合物交联胶束,利用透射电镜表征了形貌与尺寸,研究明确了其形状和尺寸的稳定性。结果表明,上述因素均会影响共聚物的自组装行为和自组装胶束的形态,经乙二胺交联得到的交联自组装胶束平均粒径为145.4nm,并具有良好的形状和尺寸稳定性。

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