title: Photostability and Performance of Polystyrene Films Containing 1,2,4-Triazole-3-thiol Ring System Schiff Bases.
abstract: Series of 4-(4-substituted benzylideneamino)-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazole-3-thiols were synthesized and their structures were confirmed. The synthesized Schiff bases were used as photostabilizers for polystyrene against photodegradation. Polystyrene polymeric films containing synthesized Schiff bases (0.5% by weight) were irradiated (λmax= 365 nm and light intensity = 6.43 × 10-9ein·dm-3·s-1) at room temperature. The photostabilization effect of 1,2,4-triazole-3-thiols Schiff bases was determined using various methods. All the additives used enhanced the photostability of polystyrene films against irradiation compared with the result obtained in the absence of Schiff base. The Schiff bases can act as photostabilizers for polystyrene through the direct absorption of UV radiation and/or radical scavengers.
authors.affiliation: Department of Chemistry, College of Science, University of Al-Mustansiriyah, Baghdad 10052, Iraq. qgassan@gmail.com.
authors.forename: Gassan Q
authors.initials: GQ
authors.lastname: Ali
authors.affiliation: Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia. gelhiti@ksu.edu.sa.
authors.forename: Gamal A
authors.initials: GA
authors.lastname: El-Hiti
authors.affiliation: Department of Chemistry, College of Science, University of Al-Mustansiriyah, Baghdad 10052, Iraq. ivanhrtomy@gmail.com.
authors.forename: Ivan Hameed R
authors.initials: IH
authors.lastname: Tomi
authors.affiliation: College of Pharmacy, Privet Uruk University, Baghdad 10069, Iraq. raghadalihaddad@gmail.com.
authors.forename: Raghad
authors.initials: R
authors.lastname: Haddad
authors.affiliation: Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq. alaaalqaisisma@gmail.com.
authors.forename: Alaa J
authors.initials: AJ
authors.lastname: Al-Qaisi
authors.affiliation: Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq. emadayousif@gmail.com.
authors.forename: Emad
authors.initials: E
authors.lastname: Yousif
mesh_terms: D008567:Membranes, Artificial; D055668:Photochemical Processes; D011137:Polystyrenes / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D008567:Membranes, Artificial; D011137:Polystyrenes; D012545:Schiff Bases; D013438:Sulfhydryl Compounds; D014230:Triazoles
keywords: 1,2,4-triazole-3-thiol; Schiff bases; UV light; functional group index; photostabilization; polystyrene