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利用原子转移自由基聚合法(ATRP)合成了分子量可控、分子量分布窄的嵌段共聚物聚苯乙烯-b-聚丙烯酸叔丁酯(PSt-b-PtBA),进而在酸性条件下由水解反应得到了两亲性嵌段共聚物聚苯乙烯-b-聚丙烯酸(PSt-b-PAA),并通过凝胶渗透色谱(GPC)、傅立叶变换红外光谱(FTIR)、核磁共振(1HNMR)等测试手段对产物进行了表征.使三种分子量不同的两亲性嵌段共聚物在离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIM][PF6])中进行自组装,通过激光粒度分析仪(DLS)和透射电子显微镜(TEM)研究了聚合物在离子液体中自组装的胶束尺寸和结构形态.当PSt的链段长度一定时,胶束的形状主要依赖于PAA链的长度.当PAA链段较长时,胶束呈球形;当PAA链段较短时,则变成不规则的花生状胶束.
Polystyrene-b-poly (t-butyl acrylate) (PSt-b-PtBA), a block copolymer with controlled molecular weight and narrow molecular weight distribution, was synthesized by atom transfer radical polymerization (ATRP) The amphiphilic block copolymer polystyrene-b-polyacrylic acid (PSt-b-PAA) was obtained and characterized by gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance The self-assembly of three amphiphilic block copolymers with different molecular weights was carried out in the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM] [PF6]) , The size and morphology of the micelles self-assembled in ionic liquids were investigated by laser particle size analyzer (DLS) and transmission electron microscopy (TEM) .When the segment length of PSt is constant, the shape of micelles mainly depends on PAA chain length.When PAA segment is longer, the micelles are spherical; when PAA segment is shorter, it becomes irregular peanut micelles.