Utilization of Diospyros peregrina as a Natural Antioxidant in Radiation Vulcanized Natural Rubber Latex Film

Abstract

A study of the effect of natural antioxidant on the aging property radiation vulcanized natural rubber latex (RVNRL) film has been
done. The aqueous extract of Diospyros peregrina (Gab) was used as natural antioxidant. Radiation vulcanization of natural rubber latex
(NRL) was done by using Co-60 gamma radiator at room temperature, using n-butyl acrylate (n-BA) as sensitizer. Various
concentrations of natural antioxidant were blended with NRL just before irradiation. It was found that addition of natural antioxidant
into NRL would much improve the mechanical properties of rubber film after aging at 100oC temperature for 24 hours. Decreasing in
tensile strength of rubber film with 10 phr natural antioxidant and 15 kGy absorbed dose after aging was found 9.34 % compared to
13.89 % for the film having no antioxidant. The improved tear resistance of the rubber film was also found with the natural
antioxidant.