| PHOTOINITIATED INVERSE EMULSION POLYMERIZATION OF SODIUM ACRYLATE |
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| 作者姓名： | Lian-yingLiu Zhi-xingZhang Wan-taiYang |
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| 作者单位： | KeyLaboratoryofScienceandTechnologyofControlla~eChemicalReactions,~MinistryofEducation,CollegeofMaterialScienceandTechnology,BeijingUniversityofChemicalTechnology,Beijing100029,China |
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| 基金项目： | This work was supported by the Scientific Research Foundation for Youth(No.QN0404). |
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| 摘 要： | Photoinitiated inverse emulsion polymerization of sodium acrylate (AANa) in kerosene was carded out at room or lower temperature, using 2,2-dimethoxy-2-phenylacetophenone (DMPA) as the initiator. Kinetic investigations indicated that the polymerization could be completed in about 30 min and produce polymer with high molecular weight (10^6-10^7). It was found that monomer droplets are the main sites for the polymerization (nucleation). With the increase of DMPA concentration, polymerization rate (Rp) reaches a maximum value while molecular weight of the produced polymer has an adverse result, but the dependence of Rp on incident light intensity is similar. Influences of other parameters such as monomer concentration, emulsifier content and reaction temperature, etc. were also studied. At lower pH values of water phase, Rp depends strongly on the pH due to the electrostatic interaction between the ionized radicals and the monomer. At higher pH, Rp shows a slight dependence on pH.
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| 关 键 词： | 光聚作用 乳状液 聚丙烯酸酯钠 高分子保水剂 渗透率 |
| 收稿时间： | 2004-01-31 |
| 修稿时间： | 2004-04-07 |
PHOTOINITIATED INVERSE EMULSION POLYMERIZATION OF |
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| Lian-yingLiu Zhi-xingZhang Wan-taiYang.PHOTOINITIATED INVERSE EMULSION POLYMERIZATION OF SODIUM ACRYLATE[J].Chinese Journal of Polymer Science,2005,0(2):219-225. |
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| Authors: | Lian-ying Liu Zhi-xing Zhang Wan-tai Yang |
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| Institution: | Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, |
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| Abstract: | Photoinitiated inverse emulsion polymerization of sodium acrylate (AANa) in kerosene was carried out at room or lower temperature, using 2,2-dimethoxy-2-phenylacetophenone (DMPA) as the initiator. Kinetic investigations indicated that the polymerization could be completed in about 30 min and produce polymer with high molecular weight (106～107). It was found that monomer droplets are the main sites for the polymerization (nucleation). With the increase of DMPA concentration, polymerization rate (Rp) reaches a maximum value while molecular weight of the produced polymer has an adverse result, but the dependence of Rp on incident light intensity is similar. Influences of other parameters such as monomer concentration, emulsifier content and reaction temperature, etc. were also studied. At lower pH values of water phase, Rp depends strongly on the pH due to the electrostatic interaction between the ionized radicals and the monomer. At higher pH, Rp shows a slight dependence on pH. |
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| Keywords: | Photopolymerization Inverse emulsion Sodium acrylate Kinetics |
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