The characterization of latex particles prepared by pulsed electron beam induced emulsion polymerization |
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| Authors: | Yongfei Xu Mozhen Wang Xuewu Ge |
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| Institution: | 1. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, PR China;2. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, PR China;1. Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea;2. Department of Electrical Engineering, KAIST, Daejeon 305-701, Republic of Korea;3. Department of Chemistry Education, Chungbuk National University, Cheongju 361-763, Republic of Korea;4. Department of Chemistry and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea;1. Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan 430030, China;2. Department of Chemistry, Wuhan University, Wuhan 430072, China |
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| Abstract: | The emulsion polymerization of styrene (St) and methyl methacrylate (MMA) induced by 10 MeV pulsed electron beams (PEB) was investigated. The monomer conversion of MMA and St was found to be very low so that the final prepared poly(methyl methacrylate) (P(MMA)) and polystyrene (PS) latex particles exhibit porous structures, as verified by TEM and SEM observations. The results of dynamic light scattering (DLS) and gel permeation chromatography (GPC) showed that both the particle size and the molecular weight of PS and PMMA latexes decrease with the increase of the absorbed dose. However, the molecular weights and the particle sizes of the PS and PMMA latexes change differently with the irradiation time. This work indicated that emulsion polymerization induced by high energy electron beam has an advantage over that induced by γ-ray or chemical initiators in the preparation of latex with a low molecular weight and porous structure. |
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