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

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