Synthesis of Shell Cross-Linked Block Copolymer Micelles with Poly(p-styrenesulfonic acid) in the Micelle Core
Synthesis of Shell Cross-Linked Block Copolymer Micelles with Poly(p-styrenesulfonic acid) in the Micelle Core
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DOI：
10.1021/ma0511651
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发表时间：
2005-11
期刊：
影响因子：
5.5
通讯作者：
Kozo Matsumoto;T. Hirabayashi;T. Harada;H. Matsuoka
中科院分区：
文献类型：
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作者：
Kozo Matsumoto;T. Hirabayashi;T. Harada;H. Matsuoka
通过三嵌段共聚物胶束的交联和连续化学转化，合成了以聚对苯乙烯磺酸（polySS）为核、聚苯乙烯（polySt）为壳的微粒。采用氮氧自由基聚合法合成了三嵌段共聚物polySt-b-poly（St 0. 8-co-SBS 0.2）-b-polySSPen，其中SBS和SSPen分别表示对甲基硅环丁基苯乙烯和对苯乙烯磺酸新戊酯。通过将嵌段共聚物溶解于环己烷中，制备了以聚苯乙烯（polySSPen）为核、壳中含有交联硅环丁基基团的嵌段共聚物胶束。壳的交联由Pt催化的开环的硅环丁烷，然后在四氢萘中在对甲苯磺酸的存在下，在polySS中的新戊基酯的热分解，得到在胶束核中具有polySS的交联胶束颗粒。所得颗粒显示出独特的环境响应性溶解度，由于核壳结构与...
Fine particles having poly(p-styrenesulfonic acid) (polySS) in the core and a polystyrene (polySt) shell were synthesized by cross-linking and successive chemical transformation of triblock copolymer micelles. A triblock copolymer, polySt-b-poly(St0.8-co-SBS0.2)-b-polySSPen, was synthesized by nitroxide-mediated living radical polymerization, where SBS and SSPen denote p-(1-methylsilacyclobutyl)styrene and neopentyl p-styrensulfonate, respectively. Block copolymer micelles carrying a polySSPen core and polySt shell with cross-linkable silacyclobutyl groups in the shell were prepared by dissolving the triblock copolymer in cyclohexane. Cross-linking of the shell by Pt-catalyzed ring-opening of silacyclobutane followed by thermolysis of the neopentyl esters in polySSPen in tetralin in the presence of p-toluenesulfonic acid gave the cross-linked micellar particles with polySS in the micelle core. The obtained particles showed unique environmentally responsive solubility due to the core−shell structure with a...