- Author
-
Inaba, A.
|
Kashiwagi, T.
|
Brown, J. E.
- Title
- Effects of Initial Molecular Weight on Thermal Degradation of Poly(methyl methacrylate). Part 1. Model 1.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Journal
-
Polymer Degradation and Stability,
Vol. 21,
1-20,
1988
- Keywords
-
plastics
|
polymethyl methacrylate
|
molecular weight
|
thermal degradation
|
zip length
|
radicals
- Abstract
- The relationship between changes in degree of polymerization and conversion was obtained experimentally for three anionically polymerized PMMA samples with different initial degrees of polymerization (315, 1250 and 5690). Kinetic constants for random scission initiation and average zip length were determined by combined use of the experimental data and a theoretical model (Model 1) based on the same depropagation rate via beta scission from both primary and tertiary radicals generated from random scission of backbone C-C bonds.