Accession Number:

ADA280926

Title:

Thermal Polymerization of Styrene in the Presence of Stable Radicals and Inhibitors

Descriptive Note:

Technical rept.

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY

Report Date:

1994-06-30

Pagination or Media Count:

4.0

Abstract:

Thermal polymerization of styrene in the presence of several radical scavengers and inhibitors was investigated. Rates, molecular weights and polydispersities depend on the nature of the scavenger, on its concentration and reaction temperature. In the best controlled systems, molecular weights up to M sub n approx. 10,000 and polydispersities M sub wM sub n approx. 1.2 were observed. It is proposed that in addition to the reversible activation by the homolytic cleavage of the dormant P-R species, degenerative chain transfer reactions may be involved.

Subject Categories:

  • Organic Chemistry
  • Polymer Chemistry
  • Miscellaneous Materials
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE