A new tin(IV) complex was synthesized to inhibit the effect of UV light on PVC films. The new dibutyl tin(IV) complex coordinated to captopril as a ligand (Bu2SnL2) were used as additive to reduce the deterioration of PVC films under irradiation of UV light. Tin (IV) complex efficiency was examined under accelerated UV irradiation conditions for 300h at ambient temperature. The shifts in the FTIR index of hydroxyl, carbonyl and carbine, in addition to changes in weight, viscosity and surface morphology was used to evaluate the performance of the new complex as a photostabilizer for PVC films.

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Novel extracted natural stabilizer for the polymer was investigated in this study. The natural anti-aging was extracted from plants and it is demonstrated that this type of stabilizers are suitable for biodegradable polymers. Gynostemma pentaphyllum (0.01–0.03 wt%) were extracted and added to the poly(vinyl chloride) blend. The achieved polymeric films were exposed to an accelerated UV light aging process for 300 hours at ambient temperature. The efficiency of tested natural stabilizer was linked to blank PVC films. FTIR spectroscopy, weight loss, electronic microscope and scanning electron microscopy were performed. Using small amount of natural stabilizer is significantly beneficial because it does not influence the PVC properties.