P(MMA-co-MAh)-g-mPEG的合成及环境敏感性  

Synthesis and Environmental Sensitivity of P( MMA-co-MAh)-g-mPEG

作　　者：刘丽[1,2] 刘晓丽[2] 杨猛[2] 刘凤岐[2] 

机构地区：[1]长春工业大学化学工程学院,长春130012 [2]吉林大学化学学院,长春130012

出　　处：《高等学校化学学报》2010年第7期1471-1474,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20274014)资助

摘　　要：采用偶合接枝法在甲基丙烯酸甲酯(MMA)和马来酸酐(MAh)无规共聚物上接枝不同含量的聚乙二醇单甲醚(mPEG),合成具有pH敏感和温度敏感的两亲接枝共聚物P(MMA-co-MAh)-g-mPEG,并对其进行了红外光谱和核磁共振波谱表征.通过紫外-可见分光光度计测量了接枝共聚物水溶液的透光率,结果表明,接枝聚合物的水溶液呈现低临界溶解温度(LCST),其LCST值对环境pH值和无机盐等因素敏感,并可通过控制亲水侧链含量来调节.Grafted amphiphilic copolymers P（ MMA-co-MAh） -g-mPEG350 with pH-sensitive and thermosensitive properties were synthesized by＂grafting onto＂method. The methoxy poly（ ethylene glycol） （ mPEG） of different contents were grafted onto random copolymers of methyl methylacrylate with maleic anhydride. The copolymers structures were characterized by FTIR and 1H NMR. Transmittance of aqueous solutions of these graft copolymers were measured by UV-Vis spectorphotometer. The result shows that these graft copolymers exhibit lower critical solution temperatures（ LCST） . These LCST＇s are sensitive to the change of pH and salinity. The LCST＇s can be adjusted by the content of hydrophilicity.

关 键 词：两亲接枝聚合物 PH敏感性 温度敏感性 低临界溶解温度 

分 类 号：O631[理学—高分子化学] TQ31[理学—化学]