PHOTOINDUCED RADICAL FORMATION IN ETHYLENE-PROPYLENE COPOLYMER BY ELECTRON-SPIN-RESONANCE SPECTROSCOPY

Authors
SINGH RP MANI R SIVARAM S LACOSTE J LEMAIRE J
Citation
Rp. Singh et al., PHOTOINDUCED RADICAL FORMATION IN ETHYLENE-PROPYLENE COPOLYMER BY ELECTRON-SPIN-RESONANCE SPECTROSCOPY, Polymer, 35(7), 1994, pp. 1382-1385
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
35
Issue
7
Year of publication
1994
Pages
1382 - 1385
Database
ISI
SICI code
0032-3861(1994)35:7<1382:PRFIEC>2.0.ZU;2-A
Abstract
The photodegradation of heterophasic ethylene-propylene copolymers and their homopolymers has been investigated by the study of hydroperoxid e formation, and by electron spin resonance (e.s.r.) and infra-red spe ctroscopy. On irradiation of polymer films in air at 60-degrees-C with a light of wavelength longer than 300 nm, polymer hydroperoxides are formed. The behaviour of peroxyl radicals generated in the samples on irradiation of polymer hydroperoxides with ultraviolet light at -50-de grees-C in vacuum has been identified and compared with a combination of e.s.r. and derivatization reactions. From Fourier transform infra-r ed spectroscopy the structure of peroxyl radicals formed is identified .