Accession Number:

AD0735278

Title:

Kinetics of Degradation of Some Polystyrenes and Copolymers of Styrene and Acrylonitrile.

Descriptive Note:

Summary technical rept. Mar-Sep 70,

Corporate Author:

DAYTON UNIV OHIO RESEARCH INST

Personal Author(s):

• Bain,David R.

Report Date:

1971-06-01

Pagination or Media Count:

64.0

Abstract:

The kinetics of degradation of some polystyrenes and a series of copolymers of styrene and up to 33.4 acrylonitrile were studies by dynamic thermogravimetry in vacuum. An average activation energy of 42.5 k. cal was found for the entire series independent of composition. The primary effect of the acrylonitrile units is to increase the rate of chain scission and this effect is masked by the overall rapid initial rate of chain scission as the sample temperature is increased. Author

Descriptors:

• *POLYMERS
• *THERMOGRAVIMETRIC ANALYSIS
• *DECOMPOSITION
• ACETONITRILE

Subject Categories:

• Physical Chemistry
• Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE