Synthesis, characterization and self-assembly of novel amphiphilic block copolymers with a polyhedral oligomeric silsesquioxanes moiety attached at the junction of the two blocks.
Synthesis, characterization and self-assembly of novel amphiphilic block copolymers with a polyhedral oligomeric silsesquioxanes moiety attached at the junction of the two blocks.
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DOI：
10.1002/marc.200900042
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发表时间：
2009-06
影响因子：
4.6
通讯作者：
Liang Zhang;Dairen Lu;K. Tao;Ruke Bai
中科院分区：
文献类型：
--
作者：
Liang Zhang;Dairen Lu;K. Tao;Ruke Bai
设计并合成了一种新型的两亲性嵌段共聚物，在聚苯乙烯和聚环氧乙烷(PEO)两嵌段的交界处含有多面体低聚倍半硅氧烷(POSS)。首先制备了含有POSS部分和PEO链的大分子引发剂，然后在大分子引发剂的存在下进行了苯乙烯的原子转移自由基聚合。聚合结果表明，该聚合过程具有可控/活性自由基聚合的特点。用凝胶渗透色谱、核磁共振氢谱和傅立叶变换红外光谱对聚合物的结构和相对分子质量进行了表征。用透射电子显微镜和扫描电子显微镜研究了聚合物的自组装行为。观察到聚合物在水溶液中可以自组装成囊泡。
A novel well-defined amphiphilic block copolymer, with the polyhedral oligomeric silsesquioxane (POSS) moiety at the junction of the two blocks of polystyrene and poly(ethylene oxide) (PEO), was designed and synthesized. First, a macroinitiator containing a POSS moiety and a PEO chain was prepared and then atom transfer radical polymerization of styrene was carried out in the presence of the macroinitiator in bulk. The polymerization results show that the process bears the characteristics of controlled/living free radical polymerizations. The structure and molecular weight of the polymers were characterized by GPC, (1) H NMR, and FT-IR spectroscopy. The self-assembly behaviors of the polymers was investigated by TEM and SEM. It was observed that the polymers can self-assemble into vesicles in aqueous solution.