Photostabilization of Poly(vinyl chloride) Films Blended with Organotin Complexes of Mefenamic Acid for Outdoor Applications

Applied Sciences

GamalA. El-Hiti¹  MohammedA. Baashen²  Emad Yousif³  AnghamG. Hadi⁴  DinaS. Ahmed⁵  Hassan Hashim⁶  Ahmed Ahmed⁷ 

[1] Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia;Department of Chemistry, College of Science and Humanities, Shaqra University, Al-Dawadmi 11911, Saudi Arabia;Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq;Department of Chemistry, College of Science, Babylon University, Babylon 51002, Iraq;Department of Medical Instrumentation Engineering, Al-Mansour University College, Baghdad 64021, Iraq;Department of Physics, College of Science, Al-Nahrain University, Baghdad 64021, Iraq;Polymer Research Unit, College of Science, Al-Mustansiriyah University, Baghdad 10052, Iraq;

关键词: poly(vinyl chloride);    mefenamate–organotin complexes;    photostabilizers;    radical scavengers;    photodegradation;    photooxidation;   

DOI  :  10.3390/app11062853

来源: DOAJ

【 摘 要 】

This study develops a process for enhancing the photostabilization of PVC films blended with a low concentration of mefenamate–tin complex. One tri-substituted and three di-substituted organotin complexes containing mefenamate unit are synthesized, and their chemical structures are established. The reactions of mefenamic acid and a number of substituted tin chlorides gave the corresponding tin complexes in 70–77% yields. Tin complexes were blended with PVC and thin films. The effect of the addition of additives against long-term irradiation (290–400 nm, 300 h) is also tested. Changes in the infrared spectra, weight, and surface of the PVC blends due to irradiation are examined and analyzed. Any damage to the PVC surface and its chemical degradation level are noticeably low in the presence of additives. Minimal photodegradation levels and surface changes of the irradiated PVC films are observed when the triphenyltin complex is used. Such a complex is highly aromatic and can act as an ultraviolet irradiation absorber and a scavenger for hydrogen chloride and radicals produced due to the photooxidation and photoirradiation of PVC films.

【 授权许可】

Unknown