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.

引用

页码：363 / 391

页数：29

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