DEGRADATION STUDIES OF POLYURETHANES BASED ON VEGETABLE OILS. PART 1. PHOTODEGRADATION

被引：24
|
作者：
Rus, Anika Z. Mohd [1 ]
Kemp, Terence J. [2 ]
Clark, Andrew J. [2 ]
机构：
[1] Univ Tun Hussein Onn Malaysia, Batu Pahat 86400, Johor, Malaysia
[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England
来源：
PROGRESS IN REACTION KINETICS AND MECHANISM | 2008年 / 33卷 / 04期
基金：
英国工程与自然科学研究理事会;
关键词：
photodegradation; photostabiliser; rapeseed oil; sunflower oil; triglyceride; UV;
D O I：
10.3184/146867808X377140
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
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页码：363 / 391
页数：29
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