ABC triblock polyampholytes containing a neutral hydrophobic block, a polyacid and a polybase
ABC triblock polyampholytes containing a neutral hydrophobic block, a polyacid and a polybase
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DOI：
10.1002/macp.1997.021981204
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发表时间：
1997-12-01
影响因子：
2.5
通讯作者：
Stadler, R
中科院分区：
文献类型：
--
作者：
Giebeler, E;Stadler, R
以四氢呋喃为溶剂，采用活性阴离子聚合法合成了结构明确的聚苯乙烯-嵌段-聚（2-乙烯基吡啶）-嵌段-聚（甲基丙烯酸叔丁酯）和聚苯乙烯-嵌段-聚（4-乙烯基吡啶）-聚（甲基丙烯酸叔丁酯）ABC三嵌段共聚物。得到了分子量分布较窄的三嵌段共聚物。聚（甲基丙烯酸叔丁酯）嵌段的水解产生聚苯乙烯-嵌段-聚乙烯基吡啶-嵌段-聚（甲基丙烯酸），其表现出pH依赖性溶液性质。在胶束溶液中的聚乙烯基吡啶和聚（甲基丙烯酸）嵌段的共聚物络合研究在溶液中的pH值的依赖电位，电导和浊度滴定，并在散装FTIR光谱。
Well defined ABC triblock copolymers of polystyrene-block-poly(2-vinylpyridine)-block-poly(tert-butyl methacrylate) and polystyrene-block-poly(4-vinylpyridine)poly(tert-butyl methacrylate) were synthesized by sequential living anionic polymerization in tetrahydrofuran. Triblock copolymers with narrow molecular weight distribution were obtained. Hydrolysis of the poly(tert-butyl methacrylate) block yields polystyrene-block-polyvinylpyridine-block-poly (methacrylic acid) which demonstrates pH-dependent solution properties. Interpolymer complexation of the polyvinylpyridine and poly (methacrylic acid) blocks in the micellar solution is studied in dependence of the pH in solution by potentiometric, conductometric and turbidimetric titration, and in bulk by FTIR spectroscopy.