"Effect of fat-soluble modified tea polyphenols on aging behavior of cis-1,4-polybutadiene rubber "

Abstract

Tea polyphenol stearate was prepared by esterification of tea polyphenols and stearic acid, and its anti-aging behavior of cis-1,4-polybutadiene rubber (BR) was studied. The results showed that the compatibility between tea polyphenol stearate and BR matrix was good, and the blooming effect was inhibited. Compared with tea polyphenols, the initial tensile strength and elongation at break of BR were increased by tea polyphenol stearate, while the Shore A hardness and crosslinking density were decreased, and the physical and mechanical properties of BR after aging for 10 d were similar to those of BR with aniline antioxidant 4010 NA. Tea polyphenols before and after modification could inhibit significantly the cis- and trans- isomerization effect of BR in the aging process, and its effect was much better than that of antioxidant 4010 NA.

Keywords

• tea polyphenols， cis-1
• 4-polybuta-diene rubber， fat-soluble modification， physical and mechanical property， thermo-oxidative aging resistance，