TRANSIENT SPECIES IN PULSE-IRRADIATED POLY(METHYL METHACRYLATE) PURE AND DOPED WITH PYRENE

Authors
SZADKOWSKANICZE M KISZKA M MAYER J
Citation
M. Szadkowskanicze et al., TRANSIENT SPECIES IN PULSE-IRRADIATED POLY(METHYL METHACRYLATE) PURE AND DOPED WITH PYRENE, Journal of polymer science. Part A, Polymer chemistry, 35(2), 1997, pp. 299-305
Citations number
24
Categorie Soggetti
Polymer Sciences
Journal title
Journal of polymer science. Part A, Polymer chemistry → ACNP
ISSN journal
0887624X
Volume
35
Issue
2
Year of publication
1997
Pages
299 - 305
Database
ISI
SICI code
0887-624X(1997)35:2<299:TSIPPM>2.0.ZU;2-J
Abstract
The spectra of transients produced in pulse-irradiated pure poly(methy l methacrylate), PMMA, at room and similar to 130 K temperatures were measured. The intermediates were identified as PMMA radicals and radic al anions. In the pulse-irradiated PMMA-pyrene (Py) system the solute excited states and radical ions were produced. Scavenging of negative charges by Py was directly observed at 130 K in a mu s time scale. Py fluorescence was found to be produced mainly as a result of Cerenkov p hotoexcitation. At room temperature, some contribution of ionic mechan ism to Py fluorescence formation was found. (C) 1997 John Wiley & Sons , Inc.