A Study of the Effective Factors on the Physical and Mechanical Properties of (EPDM/PP) Blend Thermoplastic Vulcanizate (TPV)

摘要

Thermoplastic elastomers are a new type of elastomer materials with comparable and sometimes better mechanical properties than conventional elastomers, while having processing characteristics of thermoplastic materials. Today among different types of TPE materials. polyblend thermoplastic elastomers have a special position from the point of view of economy and flexibility in selection of materials. Among polyblend TPE materials, thermoplastic vulcanizate (TPV) materials have much better physical and mechanical properties than simple blends. Among the factors which affect mechanical and physical properties of TPV materials, three of them are very important which are: size of rubbery particles dispersed in thermoplastic phase, percentage of cross - linked rubbery phase and ratio of two phases. In this research the effects of aforementioned factors on final properties of (EPDM/PP) TPV'S has been studied. Studies have shown that decrease of rubbery particle size leads to increase of tensile strength and elongation at break. With the increase of cross - linked rubbery phase percentage, tensile strength increases and tension set decreases. With the increase of percentage of plastic phase, there will be an increase in tensile strength, modulus and tension set.