SUPERCRITICAL CARBON DIOXIDE ASSISTED SYNTHESIS OF AMPHIPHILIC GRAFT COPOLYMERS BASED ON POLY(STYRENE-CO-MALEIC ANHYDRIDE) WITH METHOXYL POLY(ETHYLENE GLYCOL) SIDE CHAINS  

作　　者：Jian-hua Wang Li-ping Zhu Zhuan Yi Jian-hua Li You-yi Xu Bao-ku Zhu Jian-hua Wang;Li-ping Zhu;Zhuan Yi;Jian-hua Li;徐又一;Bao-ku Zhu

机构地区：[1]MOE Key Laboratory of Macromolecule Synthesis and Functionalization,MOE Engineering Research Center of Membrane and Water Treatment Technology,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Journal of Polymer Science》2012年第2期173-180,共8页高分子科学（英文版）

基　　金：financially supported by the 973 Program of China(No.2009CB623402);the Fundamental Research Funds for the Central Universities(MOE Engineering Research Center of Membrane and Water Treatment Technology, Grant no.KYJD09011);the 863 Program of China(No.2009AA062902);Zhejiang Provincial Sci & Tech Plan of China(No.2010C31028)

摘　　要：Supercritical carbon dioxide （scCO2） was used as a reaction medium in synthesizing amphiphilic graft copolymers composed of poly（styrene-co-maleic anhydride） （SMA） backbones and methoxyl poly（ethylene glycol） （MPEG） side chains via esterification. The synthesized copolymers were characterized by Fourier transform infrared spectroscopy （FTIR）, gel permeation chromatography （GPC）, IH-NMR, thermo-gravimetric analysis （TGA） and differential scanning calorimetric analysis （DSC）. The gelation phenomenon was suppressed effectively by tuning reaction conditions. The influences of scCO2 temperature and pressure on the conversion of anhydride were investigated. It was found that the highest conversion ratio occurred at 80~C under a constant pressure of 14 MPa or 26 MPa. With the increase of scCO2 pressure, the conversion ratio increased first, and then leveled off. The conversion ratio of anhydride could be controlled by regulating the reaction conditions. It was also revealed that using low molecular weight MPEG brought a high conversion ratio of anhydride.Supercritical carbon dioxide （scCO2） was used as a reaction medium in synthesizing amphiphilic graft copolymers composed of poly（styrene-co-maleic anhydride） （SMA） backbones and methoxyl poly（ethylene glycol） （MPEG） side chains via esterification. The synthesized copolymers were characterized by Fourier transform infrared spectroscopy （FTIR）, gel permeation chromatography （GPC）, IH-NMR, thermo-gravimetric analysis （TGA） and differential scanning calorimetric analysis （DSC）. The gelation phenomenon was suppressed effectively by tuning reaction conditions. The influences of scCO2 temperature and pressure on the conversion of anhydride were investigated. It was found that the highest conversion ratio occurred at 80~C under a constant pressure of 14 MPa or 26 MPa. With the increase of scCO2 pressure, the conversion ratio increased first, and then leveled off. The conversion ratio of anhydride could be controlled by regulating the reaction conditions. It was also revealed that using low molecular weight MPEG brought a high conversion ratio of anhydride.

关 键 词：Supercritical carbon dioxide Poly（styrene-co-maleic anhydride） Poly（ethylene glycol） Amphiphilic graftcopolymer. 

分 类 号：O631.5[理学—高分子化学]