A thermally reversible healing EPDM based elastomer with higher tensile properties and damping properties

Due to the disadvantages of lower tensile strength and fracture toughness, the widely application of Ethylene-propylene-diene-monomer rubber (EPDM) has been limited. In this study, a thermally reversible healing EPDM based elastomer with H-bonding and Zn-based-bonding dynamic cross-link network was prepared. The influence of mole ratio of ATA/MAH on tensile strength and fracture energy of mEPDM 0 -xATA was investigated. The results showed that increasing the content of ATA brings about a gradual improvement in tensile strength of the mEPDM 0 -xATA. Especially when the mole ratio of ATA/MAH is 1, the fracture energy of mEPDM 0 -ATA is dramatically enhanced to 33.9 MJ/m 3 , which is best among the ratios studied in our research. After curing, the effect of ZnCl 2 content on tensile strength and fracture energy of mEPDM-ATA-nZn was also studied. Meanwhile, the uniaxial cyclic loading-unloading tensile test was used to study the viscous damping properties of mEPDM-ATA-0.4Zn, which showed reversible repair properties after heat treatment. The results of dynamic rheological measurement showed that the damping properties were improved.