Thermoplastic vulcanizates (TPVs) are blends in which the elastomer component is dynamically vulcanizedin situ during melt mixing with the thermoplastic components at high shear and elevated temperature. The dynamic vulcanization process enables the crosslinked elastomer to become the dispersed phase, even in cases where the elastomer is the majority component or its volume fraction is greater than 0.5 [1]. Therefore, TPVs are two-phase materials in which cured elastomer particles having a diameter of a few micrometers are dispersed in the thermoplastic matrix. They can be fabricated into end-use parts by conventional melt processing for thermoplastics because the matrix consists of a thermoplastic. Also, the TPVs behave like conventional vulcanized rubber at ambient temperature but can be reprocessed. Thermoplastic elastomers of natural rubber (NR) and thermoplastic blends are known as thermoplastic natural rubbers (TPNRs). NR has an inherent affinity to some olefin thermoplastics that permits the formation of TPVs characterized by phase separated sub-micron scale morphologies and excellent physical properties [2].