Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington

Zakaria, Siti Farhana and Millington, Keith R. (2013) Simple modification measurement of photodegradability of polymers by using photo-induced chemiluminescence technique / Siti Farhana Zakaria and Keith R. Millington. Scientific Research Journal, 10 (2). pp. 51-61. ISSN 1675-7009

Official URL: https://srj.uitm.edu.my/

Abstract

Polymers and organic materials that are exposed to sunlight undergo photooxidation, which leads to deterioration oftheir physical properties. To allow adequate performance under outdoor conditions, synthetic polymers require additives such as antioxidants and UV absorbers. A major problem with optimising polymer formulations to maximise their working life span is that accelerated weathering tests are empirical. The conditions differ significantly from real weathering situations, and samples require lengthy
irradiation period. Degradation may not be apparent in the early stages of exposure, although this is when products such as hydroperoxides are formed which later cause acceleration ofoxidation. Asimple way ofquantifying the
number of free radicals presents in organic materials following exposure to light or heat is by measuring chemiluminescence (CL) emission. Most polymers emit CL when they undergo oxidative degradation, and it originates from the bimolecular reaction of macroperoxy radicals which
creates an excited carbonyl.

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Zakaria, Siti Farhana
farha981@salam.uitm.edu.my
Millington, Keith R.
UNSPECIFIED
Subjects: Q Science > QD Chemistry > Organic chemistry > Oxidation
Q Science > QD Chemistry > Physical and theoretical chemistry > Free radicals (Chemistry)
Q Science > QD Chemistry > Physical and theoretical chemistry > Chemiluminescence
Q Science > QD Chemistry > Physical and theoretical chemistry > Photochemistry
Divisions: Universiti Teknologi MARA, Shah Alam > Research Management Centre (RMC)
Journal or Publication Title: Scientific Research Journal
UiTM Journal Collections: UiTM Journal > Scientific Research Journal (SRJ)
ISSN: 1675-7009
Volume: 10
Number: 2
Page Range: pp. 51-61
Keywords: chemiluminescence, free radical, photooxidation, oxidation
Date: 2013
URI: https://ir.uitm.edu.my/id/eprint/13047
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