Polymers 2015, 7(6), 1005-1019; doi:10.3390/polym7061005
Photochemical Stability and Photostabilizing Efficiency of Poly(methyl methacrylate) Based on 2-(6-Methoxynaphthalen-2-yl)propanoate Metal Ion Complexes
1
Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq
2
Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, Post Office Box 10219, Riyadh 11433, Saudi Arabia
3
College of Pharmacy, Babylon University, Post Office Box 4, Babylon, Iraq
*
Authors to whom correspondence should be addressed.
Academic Editor: Changle Chen
Received: 21 April 2015 / Revised: 16 May 2015 / Accepted: 25 May 2015 / Published: 3 June 2015
Abstract
The photostabilization of poly(methyl methacrylate) (PMMA) films having 2-(6-methoxynaphthalen-2-yl)propanoate and Sn(II), Ni(II), Zn(II) and Cu(II) complexes was investigated. The production of PMMA films containing such complexes (0.5% by weight) was carried out by the casting method using chloroform. The photostabilization activities of the compounds were determined by monitoring the hydroxyl index with irradiation time. The quantum yield of the chain scission (Φcs) for the complexes in PMMA films and the changes in the viscosity average molecular weight of PMMA with irradiation time were evaluated. The rate of photostabilization for PMMA in the presence of the additives was found to follow the order NiL2 > CuL2 > ZnL2 > SnL2 (L, ligand). Depending on the structure of the additive, such as a peroxide decomposer, UV absorption or a radical scavenger for the photostabilizer, several mechanisms are suggested. View Full-TextKeywords:
photostabilizer; UV absorber; photochemistry; carboxylate; ultraviolet-visible spectroscopy; PMMA
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MDPI and ACS Style
Yousif, E.; El-Hiti, G.A.; Haddad, R.; Balakit, A.A. Photochemical Stability and Photostabilizing Efficiency of Poly(methyl methacrylate) Based on 2-(6-Methoxynaphthalen-2-yl)propanoate Metal Ion Complexes. Polymers 2015, 7, 1005-1019.
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