Affordable Access

Publisher Website

Antioxidants and stabilisers LXXXIX photochemical properties of conjugated dienones in trimethylcyclohexane— A model of polypropylene

Authors
Journal
Polymer Photochemistry
0144-2880
Publisher
Elsevier
Publication Date
Volume
2
Issue
5
Identifiers
DOI: 10.1016/0144-2880(82)90012-4

Abstract

Abstract Photo-oxidation of 1,3,5-trimethylcyclohexane (TMCH), used as a liquid hydroccarbon model of polypropylene, was studied using 366 nm radiation in the presence of main classes of compounds formed from phenolic antioxidants during the stabilisation process. Dienones exhibit generally a light screening effect in later stages of the photo-oxidation process. In the early stages, however, this phenomenon is preceded by a strong photoinitiation effect resulting from the presence of alkylperoxy-, hydroperoxy- and dioxycyclohexadienones which are readily photolysed. Transformation products of phenolic antioxidants are to be considered as photoactive impurities accumulating stepwise in the polymeric matrix during the stabilisation process.

There are no comments yet on this publication. Be the first to share your thoughts.