Use of Oxidation Onset Temperature Measurements for Evaluating the Oxidative Degradation of Isotatic Polypropylene

The widespread use of polymeric materials in many applications requires polymers that are weather resistant. The aim of this study is to examine the usefulness of oxidation onset temperature measurements as a tool for evaluating oxidative degradation of isotatic polypropylene. Differential scanning...

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Bibliographic Details
Published in:Journal of polymers and the environment 2004-01, Vol.12 (1), p.11-16
Main Authors: Volponi, José Eduardo, Mei, Lúcia Helena Innocentini, Rosa, Derval dos Santos
Format: Article
Language:English
Subjects:
Aging
Aging (artificial)
Calorimetry
Climatology
Degradation
Food science
Light microscopy
Oxidation
Polymers
Polypropylenes
Q1
Temperature
Temperature measurement
Weather
Weathering
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Summary:The widespread use of polymeric materials in many applications requires polymers that are weather resistant. The aim of this study is to examine the usefulness of oxidation onset temperature measurements as a tool for evaluating oxidative degradation of isotatic polypropylene. Differential scanning calorimetry was used to measure the oxidation onset temperature in formulations of isotatic polypropylene containing different concentrations of light and thermal stabilizers after aging in a Weather-Ometer. Oxidation onset temperature gave better results than oxidation induction time for evaluating the degradation of isotatic polypropylene during aging in a Weather-Ometer. However, both tests showed a poor correlation with the appearance of cracks seen by optical microscopy.
ISSN:1566-2543
1572-8919
1572-8900
DOI:10.1023/B:JOOE.0000003123.68569.0e