CO2-Responsive graft copolymers: synthesis and characterization

摘要: 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. well-defined poly(N,N-dimethylacrylamide-co-pentafluorophenyl acrylate) (P(DMA-co-PFPA)) was synthesized by reversible addition fragmentation chain transfer (RAFT) bearing reactive pentafluorophenyl esters as grafting sites on hydrophilic backbone. Then, amino end-functionalized poly(2-(diethylamino)ethyl methacrylate) (PDEAEMA) known its CO2 responsiveness hydrophobic poly(methyl (PMMA) were prepared atom (ATRP) side blocks, respectively. Subsequently, active-ester amine chemistry, resulted in either homo-side chains or discrete multi-functional hetero chains. Importantly, this utilizing chemistry appeared to be efficient method fabricate copolymers. Interestingly, both – due their amphiphilic nature could self-assemble into vesicles aqueous solution displayed expansion owing the protonation of tertiary groups PDEAEMA under stimulation.