Efficiency assessment of additives in thermal degradation of i-PP by chemiluminescence - II. Selenium

Authors
Jipa, S Setnescu, R Setnescu, T Zaharescu, T
Citation
S. Jipa et al., Efficiency assessment of additives in thermal degradation of i-PP by chemiluminescence - II. Selenium, POLYM DEGR, 68(2), 2000, pp. 165-169
Citations number
30
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER DEGRADATION AND STABILITY
ISSN journal
01413910 → ACNP
Volume
68
Issue
2
Year of publication
2000
Pages
165 - 169
Database
ISI
SICI code
0141-3910(2000)68:2<165:EAOAIT>2.0.ZU;2-#
Abstract
The thermal stability of isotactic polypropylene stabilized with selenium a nd selenium/triazine couples has been investigated by chemiluminescence in air at 180 degrees C. The main kinetic parameters (t(i), t(1/2), t(max), V- ox(max) and I-max) were determined for three selenium concentrations (0.15, 0.25 and 0.50 wt%). The cooperative factors for selenium and some efficien t triazines in oxidation of i-PP were obtained for different triazine/Se ra tios (from 0.3 up to 3.3). A stabilization mechanism based on the modificat ion in selenium chemical state is proposed. (C) 2000 Elsevier Science Ltd. All rights reserved.