Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 76: Issue 1
DSC combined with chemiluminescence for studying polymer oxidation
Authors:
P. Fearon University of Sussex Department of Chemistry Brighton BN1 9QJ United E-mail Brighton BN1 9QJ United E-mail

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S. Bigger Victoria University of Technology Kingdom ol of Molecular Sciences P.O. Box 14428 Melbourne City Mail Centre Melbourne 8001 Australia P.O. Box 14428 Melbourne City Mail Centre Melbourne 8001 Australia

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N. Billingham University of Sussex Department of Chemistry Brighton BN1 9QJ United E-mail Brighton BN1 9QJ United E-mail

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Pages:
75–83
Online Publication Date:
03 Nov 2004
Publication Date:
01 Apr 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000027805.48648.c2
Keywords:
DSC; chemiluminescence; polymer oxidation; OIT
Restricted access

Abstract  

A DSC instrument modified to incorporate a chemiluminescence (CL) detector has been used to make simultaneous measurements of heat flow and light emission for oxidising polymer samples. Comparison of heat flow and light emission from unstabilised polypropylene shows a linear relation between heat flow and square root of intensity, giving indirect confirmation of the Russell mechanism for CL emission. Measurements of oxidation induction times (OIT) for stabilised samples show excellent correlation of the two techniques. The advantage of the CL method in being insensitive to thermal transitions in the sample is illustrated by a study of poly(ethylene terephthalate), whilst the very high sensitivity of CL detection is illustrated by its ability to detect peroxides at levels which are not detected by DSC. Finally, the limitations of the OIT approach in lifetime prediction by Arrhenius extrapolation are emphasised.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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