Epimerization of isotactic polystyrene

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1979 English Publisher:Springer Science and Business Media LLCJournal:Polymer Bulletin, volume 1, pages 445-450 (issn: 0170-0839, eissn: 1436-2449,

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Authors: Lloyd Shepherd; Teng Ko Chen; H. James Harwood;

doi: 10.1007/bf00284418

Epimerization of isotactic polystyrene

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Abstract

A procedure for epimerizing isotactic polystyrene and a Monte-Carlo computer program for simulating polymer epimerization reactions have been developed. The 300 MHz methine proton resonance patterns of partially epimerized isotactic polystyrene and of free radical initiated polystyrene have been analyzed. The latter polymer is essentially atactic (σ=0.45±0.05) and has the same nmr spectrum as completely epimerized polystyrene. Conventional polystyrene therefore seems to be at stereochemical equilibrium.

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