Journal ArticleDOI
Gamma-, photo-, and thermally-initiated oxidation of isotactic polypropylene†
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TLDR
In this paper, the detailed oxidation products have been identified and compared from the γ-, photo-, and thermally-initiated oxidation of unstabilized polypropylene films.Abstract:
The detailed oxidation products have been identified and compared from the γ-, photo-, and thermally-initiated oxidation of unstabilized polypropylene films. Products were identified and quantified by a combination of iodometric analysis and infrared spectroscopy. Spectral resolution was enhanced by derivatization reactions which allow the quantification of primary, secondary, and tertiary hydroperoxide and alcohol groups as well as more reliable analysis of carbonyl species. In contrast to polyethylene oxidation which yields predominantly ketone with lesser amounts of secondary hydroperoxide and carboxylic acid, polypropylene oxidizes to give predominantly tertiary hydroperoxide and lesser quantities of secondary hydroperoxide and ketone. In addition carboxylic acid groups are a minor product except at high degrees of thermal and photoinitiated oxidation. © 1993 John Wiley & Sons, Inc.read more
Citations
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Journal ArticleDOI
A study on the photo-degradation of zinc oxide (ZnO) filled polypropylene nanocomposites
Hongxia Zhao,Robert K.Y. Li +1 more
TL;DR: In this paper, the photo-degradation characteristics for zinc oxide (ZnO) nanoparticle filled polypropylene (PP) nanocomposites were studied, and it was shown that ZnO nanoparticles significantly reduced the extent of photo degradation.
Journal ArticleDOI
Drier influence on the curing of linseed oil
TL;DR: In this article, the authors used Fourier transform infrared spectroscopy to investigate the oxidative polymerisation of linseed oil in presence of cobalt 2-ethylhexanoate drier.
Journal ArticleDOI
The release process of microfibers: from surgical face masks into the marine environment
TL;DR: In this paper, an estimation of the release of microfibers by a surgical mask dumped in the marine environment was carried out using artificial weathering experiments, which indicated that a single surgical mask submitted to 180 hours UV-light irradiation and vigorous stirring in artificial seawater may release up to 173,000 fibers/day.
Journal ArticleDOI
Natural Weathering Studies of Polypropylene
TL;DR: In this paper, a study of the variation of degradation behavior of polypropylene (PP) film during tropical summer and winter seasons is presented, where the photodegradation is followed by Fourier transform infrared (FTIR) spectroscopic technique.
Journal ArticleDOI
Photodegradation of polypropylene nanocomposites
Bénédicte Mailhot,Sandrine Morlat,Jean-Luc Gardette,Sylvain Boucard,Sylvain Boucard,Jannick Duchet,Jean-François Gérard +6 more
TL;DR: In this paper, the photochemical behavior of polypropylene-clay nanocomposites was studied and the presence of stabilisers in the formulation has also been analyzed from the comparison of the rates of oxidation of stabilised and non-stabilised nanocompositionites.
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