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Triblock copolymer based on poly(propylene oxide) and poly(1-11- acryloylundecyl-3-methyl-imidazolium bromide)

机译:基于聚环氧丙烷和聚(1-11-丙烯酰十一烷基-3-甲基咪唑溴化物)的三嵌段共聚物

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摘要

The controlled atom transfer radical polymerization of an ionic liquid, 1-(11-acryloylundecyl)-3-methyl imidazolium bromide (ILBr), from both ends of a telechelic poly(propylene oxide) (PPO) macroinitiator, end-functionalized with bromoisobutyryloyl is reported. The resulting highly water-soluble triblock, poly(ILBr-b-PO-b-ILBr) is multistimuli responsive. This new class of triblocks exhibits classical surface activity in lowering surface tension at the air-water interface and in modifying wetting in waterborne coatings. It also immunizes model colloids against coagulation induced by Debye-Hückel (indifferent electrolyte) electrostatic screening. Further, sol-gel thermoreversibility is unexpectedly found as an additional form of stimuli responsiveness. A new class of aqueous thermoreversible triblock copolymers with an LCST intervening a sol-gel transition is presented via controlled ATRP synthesis. The triblock copolymer exhibits classical surface activity, is multistimuli responsive, and immunizes charged colloids against ionic strength driven coagulation.
机译:报道了离子液体 1-(11-丙烯酰十一烷基)-3-甲基咪唑溴化物 (ILBr) 的受控原子转移自由基聚合,来自伸螯合聚环氧丙烷 (PPO) 宏引发剂的两端,末端用溴异丁酰基官能团化。由此产生的高水溶性三嵌段聚(ILBr-b-PO-b-ILBr)具有多刺激响应性。这种新型三嵌段在降低空气-水界面的表面张力和改变水性涂料的润湿性方面表现出经典的表面活性。它还使模型胶体免受 Debye-Hückel(无动于衷的电解质)静电筛选诱导的凝固。此外,溶胶-凝胶热可逆性意外地被发现是刺激响应性的另一种形式。通过受控ATRP合成,提出了一类新型水性热可逆三嵌段共聚物,其LCST介入溶胶-凝胶转变。三嵌段共聚物表现出经典的表面活性,具有多刺激响应性,并可使带电胶体免受离子强度驱动的凝固。

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