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

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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.

Item Type: Article
Creators:
CreatorsEmail
Zakaria, Siti Farhanafarha981@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: Research Management Institute (RMI)
Journal or Publication Title: Scientific Research Journal
ISSN: 1675-7009
Volume: 10
Number: 2
Page Range: pp. 51-61
Item ID: 13047
Uncontrolled Keywords: chemiluminescence, free radical, photooxidation, oxidation
Last Modified: 30 May 2016 04:34
Depositing User: Staf Pendigitalan 1
URI: http://ir.uitm.edu.my/id/eprint/13047

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