Photostability of PVC Films by using Safety Synthetic  Biolubricant as Additives

Emad Yousif; Rahimi M. Yusop; Dina S. Ahmed

Emad Yousif Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq
Rahimi M. Yusop School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Dina S. Ahmed Department of Medical Instrumentation Engineering, Al-Mansour University College, Baghdad 64021, Iraq

Keywords: UV-light; photostabilizer; poly(vinyl chloride); epoxidized oleic acid; carbonyl; polyene; hydroxyl; indices; irradiation time; viscosity; molecular weight; quantum yield; chain scission

Abstract

Stabilization standards of poly(vinyl chloride) (PVC) films fundamentally depend on essential laws: solvation and "reverberation" stabilization. The photo-stabilization of PVC films by epoxidized oleic acid was investigated. Photo-stabilization activities 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 tracked using tetrahydrofuran as a solvent. The quantum yield of the chain scission (Φ_cs) was evaluated and found with range 4.53E10^-8 and 8.12E10^-8. Postulated mechanisms were outlined depending on the structure of the additive.