ESR TOMOGRAPHY OF THE POSTRADIATION OXIDATION OF AMORPHOUS-CRYSTALLINE POLYPROPYLENE

Authors
YAKIMCHENKO OE DEGTYAREV EN ERMAKOVA EA LEBEDEV YS
Citation
Oe. Yakimchenko et al., ESR TOMOGRAPHY OF THE POSTRADIATION OXIDATION OF AMORPHOUS-CRYSTALLINE POLYPROPYLENE, High energy chemistry, 27(4), 1993, pp. 279-283
Citations number
8
Categorie Soggetti
Chemistry Physical
Journal title
High energy chemistry → ACNP
ISSN journal
00181439
Volume
27
Issue
4
Year of publication
1993
Pages
279 - 283
Database
ISI
SICI code
0018-1439(1993)27:4<279:ETOTPO>2.0.ZU;2-I
Abstract
The postradiation oxidation of amorphous-crystalline polypropylene, ga mma-irradiated at room temperature in the presence of oxygen, has been studied by ESR tomography. A method of analysis of the depth of destr uction of the sample is proposed. The system of differential equations describing the process has been solved numerically, and the solutions obtained have been analyzed. The shape of the reaction front and the rate constant of the reaction R + O2 --> RO2 have been determined, The physiological meaning of the constant k1 is discussed.