IDENTIFICATION OF FREE RADICALS IN THE PHOTODEGRADATION OF POLYSTYRENE AND ITS HOMOLOGS.

Abstract

The photolysis of polystyrene and poly(alpha-methylstyrene) was studied by electron-spin-resonance (ESR) techniques using highly concentrated, glassy solutions of the polymers near liquid-nitrogen temperature. Care was taken to ensure detection of the primary free-radical species. The use of poly(1-vinylnaphthalene) and polystyrene-2,3,4,5,6-d5 verified that the primary free radical is located on the polymer chain and not the ring. The ESR spectra obtained for both polystyrene and poly(alpha-methylstyrene) are consistent with -CH2-PrC(.)-CH2-(.). Interpretation of the observed spectra is made on the basis of the stereochemistry of the polymer chain. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 06, 1967
Accession Number
AD0664472

Entities

People

  • R. B. Fox
  • R. F. Cozzens
  • W. B. Moniz

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Alkenes
  • Dielectric Polymers
  • Electron Spin Resonance
  • Free Radicals
  • Magnetic Resonance
  • Polymers
  • Polystyrenes
  • Resonance
  • Spectra
  • Spin Resonance

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Organic Chemistry

Technology Areas

  • Microelectronics