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Macromers by carbocationic polymerization

7. Emulsion copolymerization of α-(p-vinylphenyl) polyisobutylene with styrene and the impact strength of poly(styrene-g-lsobutylene)

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Summary

Copolymerization of α-(p-vinylphenyl) polyisobutylene(p-polyisobutenylstyrene, PIB-St) with styrene (St) in emulsion has been investigated. Copolymerization occurs only when the reaction locus is the monomer droplet. Conventional emulsion copolymerizations, in which the polymerization occurs in the micelle/aqueous phase, yielded mainly polystyrene. The monomer droplet method yielded graft polymers in good yield. The impact strength of poly(styrene-g-isobutylene) has been studied. The graft with relatively long PIB branches (¯Mn = 5×104) exhibited improved impact strength over that of polystyrene, while the graft with short PIB branches (¯Mn = 6×103) gave lower impact values.

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References

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Authors and Affiliations

  1. Institute of Polymer Science, University of Akron, 44325, Akron, OH, USA

    Joseph P. Kennedy & C. Y. Lo

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  1. Joseph P. Kennedy
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  2. C. Y. Lo
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Kennedy, J.P., Lo, C.Y. Macromers by carbocationic polymerization. Polymer Bulletin 13, 441–446 (1985). https://doi.org/10.1007/BF01033342

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  • DOI: https://doi.org/10.1007/BF01033342

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