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OALib Journal期刊
ISSN: 2333-9721
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可逆加成-断裂链转移方法合成两亲液晶嵌段功能大分子及其自组装的研究
DOI: 10.3724/SP.J.1105.2013.12156, PP. 102-111
Keywords: 嵌段功能大分子,胆固醇液晶元,可逆加成-断裂链转移聚合,纳米沉淀法,溶液自组装
Abstract:
采用可逆加成-断裂链转移(RAFT)可控聚合反应方法,合成制备了一系列窄分子量分布、结构规整的两亲液晶嵌段功能大分子聚甲基丙烯酸亚己基胆固醇酯-b-聚甲基丙烯酸羟乙酯(PMA6Chol-block-PHEMA).运用核磁共振(NMR)、凝胶渗透色谱仪(GPC)、示差扫描热分析仪(DSC)和热失重分析仪(TGA)对制备所得两亲嵌段功能大分子的化学结构、热物理性能以及液晶相结构与转变温度进行了研究.在此基础上,采用纳米沉淀法研究了所得系列液晶嵌段功能大分子在混合溶剂中的自组装,制备得到微米尺度球形组装体.研究结果表明刚性胆固醇液晶共聚单元的存在对于溶液自组装产生重要影响.
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