IR-change and colour changes of long-oil air drying alkyd paints as a result of UV irradiation

被引：19

作者：

Cakic, Suzana M. ^{[1
]}

Ristic, Ivan S. ^{[2
]}

Vladislav, Jaso M. ^{[2
]}

Stamenkovic, Jakov V. ^{[1
]}

Stojiljkovic, Dragan T. ^{[1
]}

机构：

[1] Univ Nis, Fac Technol, Leskovac 16000, Serbia

[2] Univ Novi Sad, Fac Technol, Novi Sad 21000, Serbia

来源：

PROGRESS IN ORGANIC COATINGS | 2012年 / 73卷 / 04期

关键词：

Alkyd; Ageing; Stabilization; FT-IR; Colour spectroscopy; LINSEED OIL; LIGHT STABILIZERS; DEGRADATION;

D O I：

10.1016/j.porgcoat.2010.12.002

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study the formation of photo-oxidative species was studied by monitoring the changes in the FT-IR spectra and colour changes. To stabilize long-oil air (hying alkyd paint, separate and synergistic influence of two stabilizers were used Uvasorb (R) S28 as the UV-absorber and Uvasorb (R) HA29 as the stabilizer which inhibits the degradation of some groups. In the presence of UV radiation (450h, lambda > 300 nm), the alkyd paint undergoes photodegradation with gradual change of its colour. The photochemical degradation of the alkyd paint is associated with an increase in the hydroxyl content and broadening of the absorption in the carbonyl region. Analysis of the colour changes in alkyd surface during photodegradation was carried out by measuring CIEL*a*b* colour components (L*, a*, b. and Delta E*). Overall, Delta E* colour change correlates well with photodegradation of alkyd paint by relative increase of the concentration of carbonyl and hydroxyl groups determinated by FT-IR measurements. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：401 / 408

页数：8

共 16 条

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