ST／2VP／DM三元共聚物的合成及其pH敏感性能研究

Synthesis of poly（ST/2VP/DM） and study on its pH sensitivity

采用乳液聚合的方法，以K2S2O8和AIBN为双引发剂，合成了苯乙烯-二乙烯基吡啶-甲基丙烯酸二甲氨基乙酯三元共聚物（P（ST／2VP／DM））。用IR、H^1-NMR、C^13-NMR等手段对该共聚物的结构进行了分析表征，并对它的pH敏感性能进行了研究。结果表明该聚合物为三元无规共聚物，并且在pH值2．0～3．0范围内显示出了良好的pH敏感性。

Poly（styrene/2-vinylpyridine/2-（N,N-dimethyl amino） ethylmethacrylate） random copolymer （P（ST/2VP/DM）） were synthesized by emulsion polymerization method using K2S2O8 and AIBN as co-initiators. IR, H^1-NMR and C^13-NMR were used to characterize the molecular structure of the copolymer. The pH sensitivities of the P（ST/2VP/DM） under different pH conditions were also studied which indicating its good pH sensitive property during the range of pH=2.0-3.0.