PHOTOINITIATED INVERSE EMULSION POLYMERIZATION OF SODIUM ACRYLATE  

作　　者：Lian-yingLiu Zhi-xingZhang Wan-taiYang 

机构地区：[1]KeyLaboratoryofScienceandTechnologyofControlla~eChemicalReactions,~MinistryofEducation,CollegeofMaterialScienceandTechnology,BeijingUniversityofChemicalTechnology,Beijing100029,China

出　　处：《Chinese Journal of Polymer Science》2005年第2期219-225,共7页高分子科学（英文版）

基　　金：This work was supported by the Scientific Research Foundation for Youth(No.QN0404).

摘　　要：Photoinitiated inverse emulsion polymerization of sodium acrylate(AANa)in kerosene was carried out at room orlower temperature,using 2,2-dimethoxy-2-phenylacetophenone(DMPA)as the initiator.Kinetic investigations indicated thatthe polymerization could be completed in about 30 min and produce polymer with high molecular weight(10~6～10~7).It wasfound that monomer droplets are the main sites for the polymerization(nucleation).With the increase of DMPAconcentration,polymerization rate(R_p)reaches a maximum value while molecular weight of the produced polymer has anadverse result,but the dependence of R_p on incident light intensity is similar.Influences of other parameters such asmonomer concentration,emulsifier content and reaction temperature,etc.were also studied.At lower pH values of waterphase,R_p depends strongly on the pH due to the electrostatic interaction between the ionized radicals and the monomer.Athigher pH,R_p shows a slight dependence on pH.Photoinitiated inverse emulsion polymerization of sodium acrylate(AANa)in kerosene was carried out at room orlower temperature,using 2,2-dimethoxy-2-phenylacetophenone(DMPA)as the initiator.Kinetic investigations indicated thatthe polymerization could be completed in about 30 min and produce polymer with high molecular weight(10~6～10~7).It wasfound that monomer droplets are the main sites for the polymerization(nucleation).With the increase of DMPAconcentration,polymerization rate(R_p)reaches a maximum value while molecular weight of the produced polymer has anadverse result,but the dependence of R_p on incident light intensity is similar.Influences of other parameters such asmonomer concentration,emulsifier content and reaction temperature,etc.were also studied.At lower pH values of waterphase,R_p depends strongly on the pH due to the electrostatic interaction between the ionized radicals and the monomer.Athigher pH,R_p shows a slight dependence on pH.

关 键 词：PHOTOPOLYMERIZATION Inverse emulsion Sodium acrylate Kinetics. 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]