Hydroperoxide formation in the early stages of polypropylene photo-oxidation

George G.A. and Ghaemy M. (1991) Hydroperoxide formation in the early stages of polypropylene photo-oxidation. Polymer Degradation and Stability, 33 3: 411-428. doi:10.1016/0141-3910(91)90086-7


Author George G.A.
Ghaemy M.
Title Hydroperoxide formation in the early stages of polypropylene photo-oxidation
Journal name Polymer Degradation and Stability   Check publisher's open access policy
ISSN 0141-3910
Publication date 1991-01-01
Sub-type Article (original research)
DOI 10.1016/0141-3910(91)90086-7
Open Access Status Not yet assessed
Volume 33
Issue 3
Start page 411
End page 428
Total pages 18
Subject 1605 Policy and Administration
2507 Polymers and Plastics
Abstract The total chemiluminescence from polypropylene films heated in an inert atmosphere is a sensitive measure of the hydroperoxide content in the induction period of photo-oxidation. The examination of the hydroperoxide content in unstabilised film melt-pressed from the powder, stabilised melt-pressed film and a commercial stabilised film all show a very rapid increase in the hydroperoxide content in the early stages of photo-oxidation which could not be detected by ATR-IR or XPS analysis. This appears as a peak in all of the films which increases in area with film thickness, indicating that it is a bulk property. While stabilisers may inhibit the photo-oxidation as measured by carbonyl index, they cannot prevent this early buildup and decay of hydroperoxides. These are believed to form by the rapid oxidation of the polypropylene in localised zones of high photoinstability. The peak in hydroperoxide content is a consequence of the kinetics of the consecutive reaction of hydroperoxide formation and photolysis which leads to secondary oxidation products and subsequent slower photo-oxidation.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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