SYNTHESIS AND PROPERTIES OF ORGANIC-INORGANIC HYBRID P(NIPAM-co-AM-co-TMSPMA)MICROGELS  

作　　者：杜滨阳 

机构地区：[1]MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science & Engineering, Zhejiang University

出　　处：《Chinese Journal of Polymer Science》2011年第4期439-449,共11页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.20604022 and 20874087);863 project(No.2009AA04Z125)

摘　　要：Utilizing the hydrolysis and condensation of the methoxysilyl moieties, organic-inorganic hybrid poly（N- isopropylacrylamide-co-acrylamide-co-3-（trimethoxysilyl）propylmethacrylate） P（NIPAM-eo-AM-eo-TMSPMA） microgels were prepared via two different methods. The first method was that the microgels were post-fabricated from the cross- linkable linear P（NIPAM-co-AM-co-TMSPMA） terpolymer aqueous solutions above the lower critical solution temperature （LCST） of the terpolymer. For the second method, the mierogels were directly synthesized by conventional surfactant free emulsion copolymerization of NIPAM, AM, and TMSPMA. The hydrodynamic diameter and stability of the resultant P（NIPAM-co-AM-co-TMSPMA） microgels strongly depend on the pH and temperature of the microgel aqueous solution. The hydrodynamic diameters of the microgels decreased with increasing the measuring temperature. The phase transition temperature of the microgels was found to be around 34℃, which was independent of the initial terpolymer concentration and shifted to lower temperature with increasing the preparation temperature. Increasing the initial amount of AM will enhance the instability of the microgels at high pH values. Moreover, the P（NIPAM-co-AM-eo-TMSPMA） microgels obtained from the linear terpolymer had more homogeneous microstructures as compared with the corresponding NIPAM/AM/TMSPMA microgels prepared by one step emulsion copolymerization as revealed by light scattering measurements.Utilizing the hydrolysis and condensation of the methoxysilyl moieties, organic-inorganic hybrid poly（N- isopropylacrylamide-co-acrylamide-co-3-（trimethoxysilyl）propylmethacrylate） P（NIPAM-eo-AM-eo-TMSPMA） microgels were prepared via two different methods. The first method was that the microgels were post-fabricated from the cross- linkable linear P（NIPAM-co-AM-co-TMSPMA） terpolymer aqueous solutions above the lower critical solution temperature （LCST） of the terpolymer. For the second method, the mierogels were directly synthesized by conventional surfactant free emulsion copolymerization of NIPAM, AM, and TMSPMA. The hydrodynamic diameter and stability of the resultant P（NIPAM-co-AM-co-TMSPMA） microgels strongly depend on the pH and temperature of the microgel aqueous solution. The hydrodynamic diameters of the microgels decreased with increasing the measuring temperature. The phase transition temperature of the microgels was found to be around 34℃, which was independent of the initial terpolymer concentration and shifted to lower temperature with increasing the preparation temperature. Increasing the initial amount of AM will enhance the instability of the microgels at high pH values. Moreover, the P（NIPAM-co-AM-eo-TMSPMA） microgels obtained from the linear terpolymer had more homogeneous microstructures as compared with the corresponding NIPAM/AM/TMSPMA microgels prepared by one step emulsion copolymerization as revealed by light scattering measurements.

关 键 词：MICROGEL THERMO-SENSITIVE Hybrid. 

分 类 号：O648.17[理学—物理化学]