Unimolecular and multimolecular associates of water soluble multiblock copolymers

N，N-二乙基丙烯酰胺(DEA)的立体定向阴离子活性聚合分别得到了具有高度全同立构、间同立构和异立构立体规律性的聚合物。以甲基丙烯酸2-(2‘-三烷基硅氧乙氧基)乙酯为原料，通过阴离子聚合和脱保护反应，制得了具有一定量身定制的水溶性聚甲基丙烯酸2-(2’-羟乙氧基)乙酯。通过静电组装和随后的共价固定过程，将具有环铵盐端的遥爪聚合物重新洗牌，得到了一系列具有新的吸引人的结构的聚合物。通过静电组装和共价固定，合成了含有聚四氢呋喃和聚环氧乙烷链段的星形聚合物、聚合物网络、聚合物大单体和环状聚合物，并用水中光散射分析了具有明确链状结构的聚(二氢呋喃)S胶束的形成。用光散射和动态粘弹性表征了聚(N，N-二甲基丙烯酰胺)-接枝-聚甲基丙烯酸甲酯在甲醇/水中的聚集行为及其网络结构。另一方面，通过离子对含水聚合物凝胶膨胀和收缩的相加作用，探讨了非离子聚合物在水中的聚集机理。通过聚合物凝胶在不同溶液中的相变分析了聚电解质在水/有机溶剂中的聚集行为。

Stereospecific anionic living polymerizations of N,N-diethylacrylamide (DEA) gave the well-defined polymers having highly isotactic, syndiotactic, and heterotactic stereoregularities, respectively. The tailored water soluble poly(2-(2'-hydroxyethoxy)ethyl methacrylate) was obtained by the anionic polymerizations of 2-(2'-trialkylsilyloxyethoxy)ethyl methacrylate and the following deprotection of the resulting polymer. A series of polymers having new attractive architectures was obtained by reshuffling of telechelic polymers having cyclic ammonium salt terminals via electrostatic assembly and by subsequent covalent fixation process. Star polymers, polymer network, polymacromonomers, and cyclics containing poly(tertahydrofuran) and poly(ethylene oxide) segments were synthesized through the electrostatic assembly and the covalent fixation.Micelle formation of poly(DEA)s having well-defined chain structures such as predicted molecular weight, narrow molecular weight distribution, and high stereoregularities was analyzed by the light scattering in water. Aggregation behavior and its network structure of poly(N,N-dimethylacrylamide)-graft-poly(methyl methacrylate) in methanol/water was characterized by the light scattering and the dynamic viscoelasticy. On the other hand, aggregation mechanism of nonionic polymers in water was discussed by the additive effect of ions on the expansion and the shrinkage of water-containing polymer gel. Aggregation of polyelectrolytes in water/organic solvents was analyzed by the phase transition of polymer gel in the presence of various counteions.