화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.23, No.1, 67-73, January, 2015
DOI10.1007/s13233-014-2188-5  Export Citation
Kinetic investigations of RAFT polymerization: Difunctional RAFT agent mediated polymerization of methyl methacrylate and styrene
Jianying Ma1, †, and Huixuan Zhang1, 2
  • 1Engineering Research Center of synthetic resin and special fiber, Ministry of Education, Changchun University of Technology, Changchun, 130012, P. R. China
  • 2Changchun Institute of Applied Chemistry, Graduate School, Chinese Academy of Sciences, Changchun, 130022, P. R. China
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A difunctional reversible addition-fragmentation transfer (RAFT) agent, S,S’-bis (α,α’-dimethylacetic acid) trithiocarbonate (BDAT) is synthesized and used as chain transfer agent (CTA) to mediate homopolymerization of methyl methacrylate (MMA) and random copolymerization of methyl methacrylate-styrene (St) system, respectively. Kinetic factors of these two polymerizations, which influence polymerization process and characteristics of polymers, are investigated. Experimental results show that molecular weights of polymers increase linearly with monomer conversions and these two polymerization kinetics behaviors exhibit “controlled/living” characteristics. For the homopolymerization of MMA, molecular weights increase gradually and are close to their theoretical values. Wherever, for the random copolymerization of MMA-St system, the presence of St has important influence on the kinetics of copolymerization. Addition of St to this system induces an induction period and this period increase with increasing content of St in monomer composition.
Keywords:trithiocarbonate;copolymerization;reversible addition-fragmentation chain;transfer (RAFT);polydispersity indexes (PDI)
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