Reversible addition-fragmentation chain-transfer (RAFT) copolymerization of vinylidene chloride and methyl acrylate

Authors

  • Romain Severac,

    1. Laboratoire de Chimie Macromoléculaire UMR-CNRS 5076, Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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  • Patrick Lacroix-Desmazes,

    Corresponding author
    1. Laboratoire de Chimie Macromoléculaire UMR-CNRS 5076, Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
    • Laboratoire de Chimie Macromoléculaire UMR-CNRS 5076, Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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  • Bernard Boutevin

    1. Laboratoire de Chimie Macromoléculaire UMR-CNRS 5076, Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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  • Poster presentation – Session B: Paper presented at the Polymers in the Third Millennium Conference, 2–6 September 2001, Montpellier, France

Abstract

The reversible addition-fragmentation chain-transfer (RAFT) copolymerization of vinylidene chloride and methyl acrylate was investigated at 70 °C in benzene. Three dithioesters were synthesized in high yield by a simple and straightforward transesterification method. These dithioesters were successfully used as reversible chain-transfer agents, as demonstrated by the increase of molecular weight with conversion, a relatively low polydispersity index (Ip = 1.5) in comparison with a blank experiment (Ip = 1.9), first-order polymerization kinetics and efficient chain extension. Nevertheless, a transfer reaction to vinylidene chloride monomer was considered to address the limitations of the RAFT process for this system. Moreover, a retardation effect was noticeable on the kinetics, depending on the structure and concentration of the transfer agent, leading to lower rate of polymerization for lower targeted molecular weights.

© 2002 Society of Chemical Industry

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