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Controlled/Living Photopolymerization of Methyl Methacrylate in Miniemulsion Mediated by HTEMPO

LIU Xiao-Xuan1,2*, JING Yan-Ni2, BAI Ying-Kun2, WU Guang-Guo2   

    1. Department of Polymeric Material and Engineering, College of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China;
    2. Department of Chemistry, College of Science, Shantou University, Shantou 515063, China
  • Received:2006-11-27 Revised:1900-01-01 Online:2007-04-10 Published:2007-04-10
  • Contact: LIU Xiao-Xuan

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Abstract: Controlled/living photopolymerization of methyl methacrylate(MMA) in miniemulsion mediated by 4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy(HTEMPO) was carried out at ambient temperature. MMA miniemulsion was prepared by using anionic surfactant SDS with cetyl alcohol as a costabilizer. The photopolymerization led to stable latices and they were obtained with neither coagulation during synthesis nor destabilization over time. It was found that the obtained MMA homopolymers exhibited relatively narrow molecular weight distributions(PDI=1.27—1.36), which was characterized by GPC. The plots of number-average molecular weight(Mn) vs. conversion and ln([M0]/[M]) vs. time were linear respectively, indicating that the reaction was a controlled/living free radical polymerization.

Key words: Methyl methacrylate(MMA), Controlled/living photopolymerization, Miniemulsion, 4-Hydroxy-2,2,6,6-tetramethyl-piperidinyloxy(HTEMPO)

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