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pH-Responsive Framboidal Vesicles Prepared using Polymerization-Induced Self-Assembly via RAFT Aqueous Dispersion Polymerization

机译:使用聚合诱导的自组装通过RAFT水性分散聚合制备的pH响应性骨折囊泡

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It is well-known that amphiphilic block copolymers undergo spontaneous self-assembly in aqueous solution. Recent advances in polymerization-induced self-assembly (PISA) have enabled block copolymer nanoparticles to be prepared directly in concentrated aqueous solution via reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization. For example, a poly(glycerol monomethacrylate) macromolecular chain transfer agent (PGMA macro-CTA) can be chain-extended using 2-hydroxypropyl methacrylate (HPMA). Self-assembly occurs to form PHPMA-core nanoparticles stabilized by the water-soluble PGMA chains. Recently, Chambon et al. have utilized RAFT seeded emulsion polymerization to chain-extend PGMA-PHPMA diblock copolymer vesicles using a third water-insoluble monomer (benzyl methacrylate), resulting in the formation of triblock copolymer vesicles with a distinctive framboidal morphology.
机译:众所周知,两亲嵌段共聚物在水溶液中经历自发的自组装。 聚合诱导的自组装(PISA)的最近进展使嵌段共聚物纳米颗粒通过可逆添加 - 碎片链转移(筏)水分散聚合,直接在浓缩水溶液中直接制备。 例如,聚(甘油单甲基丙烯酸酯)大分子链转移剂(PGMA宏CTA)可以使用2-羟丙基丙烯酸甲酯(HPMA)进行链延长。 自组装发生以形成通过水溶性PGMA链稳定的pHPMA核心纳米颗粒。 最近,Chambon等人。 利用筏子种子乳液聚合以使用第三水不溶性单体(甲基丙烯酸苄酯)来链 - 延伸PGMA-PHPMA二嵌段共聚物囊泡,导致具有独特的Framboidal形态的三嵌段共聚物囊泡形成。

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