The Synthesis, Characterization and Physical Properties of EPM-g-Polystyrene Thermoplastic Elastomers

  • J. P. Kennedy
  • R. R. Smith
Part of the Polymer Science and Technology book series (POLS, volume 4)


The synthesis, characterization and some property evaluation of a new series of graft copolymers, the EPM-g-polystyrene system, was investigated. A novel cationic initiator/coinitiator system based on certain alkylaluminum compounds was employed for graft synthesis. A systematic examination of the effect of reaction parameters such as temperature, solvent polarity, and nature of the alkylaluminum coinitiator on grafting efficiency was carried out. Reaction conditions have been optimized to achieve grafting efficiencies greater than 85%. Evaluation of the tensile properties of solution cast films of the grafts indicates that these materials possess appreciable strength in the absence of chemical vulcanization. The stress-strain properties of the grafts ranged from elastomeric to tough plastic depending on the polystyrene content. Compared to poly(styrene-b-butadiene-b-styrene) copolymers, a higher weight percent polystyrene must be incorporated into the graft copolymers to achieve comparable strengths.


Graft Copolymer Chlorine Content Number Average Molecular Weight Thermoplastic Elastomer Methyl Chloride 
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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • J. P. Kennedy
    • 1
  • R. R. Smith
    • 1
  1. 1.Institute of Polymer ScienceThe University of AkronAkronUSA

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