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中文摘要：
液晶/聚合物复合膜作为成膜材料,其紫外光固化时间对膜的电光性能及微观形貌有很大的影响。文中利用可逆加成-断裂转移自由基聚合(RAFT)制备了活性聚苯乙烯(PS)大分子引发剂,用以引发丙烯酸甲酯(MA)进行活性聚合制备聚合物分散液晶(PDLC)薄膜。系统研究了紫外光固化时间对RAFT-PS基PDLC薄膜电光性能及微观形貌的影响及影响机理。研究表明,通过RAFT法制备的PDLC在较短时间内即完成相分离,并且随着紫外光固化时间的延长,PDLC的阈值电压(Vth)和饱和电压(Vsat)升高,关态透光率(Toff)、记忆效应(ΔT)和最大透光率(Tmax)下降,薄膜的微观形貌也出现了连续明显的变化。随着紫外固化反应时间延长,聚合物基体的相对分子质量显著增加。
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