期刊
POLYMER CHEMISTRY
卷 8, 期 7, 页码 1206-1216出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6py01996j
关键词
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资金
- China Scholarship Council (CSC) [201306240132]
- Alexander-von-Humboldt foundation
A facile and versatile approach for preparing CO2-responsive graft copolymers via a grafting-to strategy that combines controlled radical polymerization with post-polymerization modification has been demonstrated. A well-defined poly(N, N-dimethylacrylamide-co-pentafluorophenyl acrylate) (P(DMA-co-PFPA)) was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization bearing reactive pentafluorophenyl esters as grafting sites on a hydrophilic backbone. Then, amino end-functionalized poly(2-(diethylamino) ethyl methacrylate) (PDEAEMA) known for its CO2 responsiveness and hydrophobic poly(methyl methacrylate) (PMMA) were prepared via atom transfer radical polymerization (ATRP) as side blocks, respectively. Subsequently, post-polymerization modification via active-ester amine chemistry, resulted in CO2-responsive graft copolymers with either homo-side chains or discrete multi-functional hetero side chains. Importantly, this grafting-to strategy utilizing active-ester amine chemistry appeared to be a facile and efficient method to fabricate graft copolymers. Interestingly, both prepared CO(2-)responsive graft copolymers - due to their amphiphilic nature - could self-assemble into vesicles in aqueous solution and displayed CO2-responsive expansion owing to the protonation of tertiary amine groups of PDEAEMA side chains under CO2 stimulation.
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