Epoxidized Natural Rubber (ENR)

Compared with natural rubber, epoxidized NR shows better oil resistance and damping and low gas perme-ability. However, its tear strength is low, which has prevented its use in pneumatic tires. These polymers offer a number of advantages such as improved oil resistance (ENR 50 is comparable to polychloroprene (CR)), low gas permeability equivalent to that of butyl rubber, and compatibility with PVC.