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通过铜催化的叠氮-炔偶联反应(CuAAC),利用grafting-onto方法合成每个主链重复单元带有多于一条侧链的高接枝密度的柱状聚合物刷.首先,合成了带有缩酮保护的甲基丙烯酸2,2-双羟甲基丙酯单体(bisMPMA),并通过可逆加成-断裂链转移(RAFT)聚合得到窄分子量分布的线形聚合物.在酸性条件下脱去缩酮保护后,以羟基与戊炔酸酐的酯化反应,得到了每个重复单元带有2个炔基的聚合物主链.之后,利用高效的CuAAC反应,将末端带有叠氮基团的聚环氧乙烷(PEO)或聚苯乙烯(PS)侧链接枝到主链上,用核磁共振氢谱(1H-NMR)和体积排阻色谱(SEC)等对聚合物刷的结构进行表征.
A grafting-onto approach was used to synthesize a high grafting polymer brush with more than one side chain per main chain repeat unit via copper-catalyzed azido-alkyne coupling reaction (CuAAC) .Firstly, Ketal-protected 2,2-bismethylolmethacrylate monomer (bisMPMA) and linear polymer of narrow molecular weight distribution by reversible addition-fragmentation chain transfer (RAFT) polymerization.Under acidic conditions After deketal protection, the backbone of the polymer with two alkynyl groups per repeating unit was obtained by the esterification of hydroxyl with pentynic anhydride, followed by efficient CuAAC reaction with azide The pendant polyethylene oxide (PEO) or polystyrene (PS) groups are grafted onto the backbone and the polymer brushes are cleaved by a nuclear magnetic resonance (1H-NMR) and size exclusion chromatography (SEC) Structure is characterized.