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Molecules 2015, 20(11), 19886-19899; doi:10.3390/molecules201119665

Photostabilizing Efficiency of PVC in the Presence of Schiff Bases as Photostabilizers

1
Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 10072, Iraq
2
Environmental Research Center, University of Technology (UOT), Baghdad 10001, Iraq
3
Department of Chemical & Process Engineering, University Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia
4
Department of Laser and Optoelectronics, University of Technology (UOT), Baghdad 10001, Iraq
5
Fuel Cell Institute, University Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Kei Saito
Received: 18 August 2015 / Revised: 4 October 2015 / Accepted: 8 October 2015 / Published: 4 November 2015
(This article belongs to the Section Photochemistry)
View Full-Text   |   Download PDF [3533 KB, uploaded 4 November 2015]   |  

Abstract

The photostabilization of polyvinyl chloride (PVC) films by Schiff bases was investigated. Polyvinyl chloride films containing 0.5 wt % Schiff bases were produced using the same casting method as that used for additive-free PVC films from tetrahydrofuran (THF) solvent. The photostabilization activities of these compounds were determined by monitoring the carbonyl, polyene and hydroxyl indices with irradiation time. The changes in viscosity average molecular weight of PVC with irradiation time were also monitored using THF as a solvent. The quantum yield of chain scission (Φcs) for the studied complexes in PVC was estimated to range between 4.72 and 8.99 × 10−8. According to the experimental results, several mechanisms were suggested, depending on the structure of the additive. Ultra violet (UV) absorption, peroxide decomposition and radical scavenging were suggested as the photostabilizing mechanisms. View Full-Text
Keywords: photochemistry; polyvinyl chloride (PVC); photostabilizer; UV absorber; UV-Vis spectroscopy photochemistry; polyvinyl chloride (PVC); photostabilizer; UV absorber; UV-Vis spectroscopy
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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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MDPI and ACS Style

Yousif, E.; Al-Amiery, A.A.; Kadihum, A.; Kadhum, A.A.H.; Mohamad, A.B. Photostabilizing Efficiency of PVC in the Presence of Schiff Bases as Photostabilizers. Molecules 2015, 20, 19886-19899.

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