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Molecules 2018, 23(4), 913; https://doi.org/10.3390/molecules23040913

Poly(vinyl Chloride) Photostabilization in the Presence of Schiff Bases Containing a Thiadiazole Moiety

1
Department of Chemistry, College of Science for Women, University of Baghdad, Baghdad 10071, Iraq
2
Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
3
Center of Excellence in Integrated Nano-Systems, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia
4
Department of Chemistry, College of Science, Tikrit University, Tikrit 34001, Iraq
5
Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq
*
Authors to whom correspondence should be addressed.
Received: 25 March 2018 / Revised: 10 April 2018 / Accepted: 13 April 2018 / Published: 15 April 2018
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Abstract

Five Schiff bases containing a thiadiazole moiety have been used as poly(vinyl chloride) photostabilizers at low concentrations. The efficiency of Schiff bases as photostabilizers was investigated using various techniques, for example, the changes in poly(vinyl chloride) infrared spectra, molecular weight, chain scission quantum yield, and surface morphology were monitored upon irradiation with an ultraviolet light. Evidently, all the additives used inhibited poly(vinyl chloride) photodegradation at a significant level. The most efficient Schiff base exhibited a high level of aromaticity and contained a hydroxyl group. It seems possible that such photostabilization could be due to the direct absorption of ultraviolet radiation by the additives. In addition, Schiff bases could act as radical scavengers and proton transfer facilitators to stabilize the polymeric materials. View Full-Text
Keywords: poly(vinyl chloride); photostability; Schiff bases; thiadiazole; average molecular weight; quantum yield; irradiation poly(vinyl chloride); photostability; Schiff bases; thiadiazole; average molecular weight; quantum yield; irradiation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shaalan, N.; Laftah, N.; El-Hiti, G.A.; Alotaibi, M.H.; Muslih, R.; Ahmed, D.S.; Yousif, E. Poly(vinyl Chloride) Photostabilization in the Presence of Schiff Bases Containing a Thiadiazole Moiety. Molecules 2018, 23, 913.

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