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Degradation studies of polyurethanes based on vegetable oils. Part 1. Photodegradation

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Mohd Rus, Anika Z., Kemp, T. J. (Terence James) and Clark, A. J. (Andrew J.). (2008) Degradation studies of polyurethanes based on vegetable oils. Part 1. Photodegradation. Progress in Reaction Kinetics and Mechanism, Vol.33 (No.4). pp. 363-391. ISSN 1468-6783

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Official URL: http://dx.doi.org/10.3184/146867808X377140

Abstract

UV-induced photodegradation has been studied of films of polyurethanes synthesised from (renewable) vegetable materials, namely rapeseed and sunflower oils. The techniques utilised were principally IR and UV-visible spectroscopy. UV(B)-photolysis of the cured films gave rise to IR bands in the carbonyl region at ca 1706 cm(-1) and a UV band at 310 mn attributed to formation of a quinone methide, an assignment supported by the development of new IR bands at 1595, 1650, and 1695 cm(-1) which are typical of this chromophore. In addition, intensification of a band at 1171 cm(-1) is attributed to cross-linking of the soft segments in the polymer.

Item Type:

Journal Article

Subjects:

Q Science > QD Chemistry
T Technology > TP Chemical technology

Divisions:

Faculty of Science > Chemistry

Library of Congress Subject Headings (LCSH):

Photodegradation, Vegetable oils, Triglycerides, Polymers -- Deterioration

Journal or Publication Title:

Progress in Reaction Kinetics and Mechanism

Publisher:

Science Reviews 2000 Ltd