Influence of epoxide content and blend ratios on strength and damping properties of thermoplastic vulcanizates based on epoxidized natural rubber and poly(ether-block-amide) copolymer blends

Specifically, increasing the epoxide content and PEBA proportion enhances strength properties, including higher Young's modulus (stiffness), toughness, tensile properties, and hardness, along with smaller vulcanized ENR domains dispersed in the PEBA matrix. [...]the decrease in tension set values indicates an improvement in the elastic properties. [...]interfacial adhesion between the ENR domains and PEBA interfaces improved, contributing to the observed enhancements in the strength and elastic properties of the TPVs with smaller ENR domains. [...]its highly flexible polymer chains enable NR to stretch and recoil easily, providing excellent elasticity and resilience. [...]NR finds applications in products such as tires, hoses, balls, cushions, and gloves [5]. [...]the epoxide content was quantified using the Equation (1) [22]: A Epoxide contetnt !mol%$ = 2.70 $ 100 (1) where A2.70 is the area under the signal at a chemical shift of 2.70 ppm, which indicates resonance of the methine hydrogen of the epoxirane ring, A5.10 is the area under the signal at a chemical shift of 5.10 ppm, which indicates olefin hydrogen of cis-1,4-polyiso-prene. 2.3.