Accession Number : ADA018348

Title :   The Effect of Bulky Cyclic Side Groups on the Heat Resistance of Carbochain Polymers,


Personal Author(s) : Korshak,V. V. ; Salazkin,S. N. ; Vinogradova,S. V. ; Slonimskii,G. L. ; Askadskii,A. A.

Report Date : SEP 1975

Pagination or Media Count : 7

Abstract : Copolymers of methylidine phthalide with styrene, acrylonitrile, and methyl methacrylate are reported. Measurement of their glass transition temperatures (T sub g s) by thermomechanical and dynamic mechanical techniques leads to an extrapolated value for the T sub g of poly(methylidine phthalide) of 370-380C. The introduction of phthalide groups into carbon-chain polymers so that part of the ring lies in the main chain leads to a sharp increase in heat resistance. (Author)

Descriptors :   *Heat resistant plastics, *Copolymers, *Phthalic acids, Transition temperature, Thermomechanics, Test methods, Styrene plastics, Acrylonitrile polymers, Acrylic resins, Molecular structure, Translations, USSR, Great Britain

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE