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Vol. 25 No. 15 (2013): Vol 25 Issue 15

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Synergistic Aging Effect of Polyether Polyurethane Coatings

https://doi.org/10.14233/ajchem.2013.14839
H.Y. Wang
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, P.R. China
Y.Z. Wang
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, P.R. China
Y.F. Jiang
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, P.R. China
X.S. Li
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, P.R. China

Corresponding Author(s) : Y.Z. Wang

hhwyz@ysu.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

The pure polyether polyurethane (ETPU) and the modified polyether polyurethane (M-ETPU) coatings containing composite additives were prepared by spin-coating technique. The accelerated aging tests of the coatings exposed to constant UV radiation with an ozone atmosphere were carried out by using a self-designed aging equipment. The aging resistance properties of the coatings were evaluated by UV-visible spectra, Fourier transform infrared spectra, yellowness index, photo-oxidation index and carbonyl index analysis. The results show that the ozone and ultraviolet initiate autoxidation of urethane bridge in the polymer chain to quinone-imide structure and trigger formation of hydroperoxides and new carbonyl species. The aging of the coatings increases with incremental exposure time, the aging of M-ETPU coating is much lower than that of ETPU coating at the same condition. There is distinct synergistic aging effect when the yellowness index, the photo-oxidation index and the carbonyl index is used as evaluation index, respectively.

Keywords

Polyether polyurethane O3/UV-aging Synergistic aging effect
Wang, H., Wang, Y., Jiang, Y., & Li, X. (2013). Synergistic Aging Effect of Polyether Polyurethane Coatings. Asian Journal of Chemistry, 25(15), 8561–8565. https://doi.org/10.14233/ajchem.2013.14839
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