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Quantitative study of photocatalyzed oxidation of ethylene–propylene rubber and atactic polypropylene
Author(s) -
Lacoste J.,
Ladsous P.,
Dieppedale M.,
Arnaud R.
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980829)69:9<1681::aid-app1>3.0.co;2-7
Subject(s) - polypropylene , ethylene propylene rubber , polymer chemistry , ethylene , natural rubber , polymer , materials science , ketone , chemistry , chemical engineering , organic chemistry , copolymer , catalysis , engineering
Abstract The effect of photoactive pigments such as ZnO, CdS, and TiO 2 on the photooxidation (with and without water vapor) of ethylene–propylene rubber and atactic polypropylene were examined. The effects of surface treatment (passivation) and low granulometry (nanopigments) were also studied for TiO 2 . A drastic increase of ketone and an inhibition of carboxylic acid formation for ZnO filled polymers were revealed and quantitatively measured by using derivatization reactions. Such a phenomenon, as well as a small decrease of average molecular weight, were explained by a modification of the ZnO decomposition mechanism of tertiary hydroperoxides. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1681–1689, 1998