Process of making a heterogeneous polymer blend

摘要: BACKGROUNDHeterogeneous polymer blends comprising a second poly mer dispersed in a matrix of a first polymer are very useful and, depending on the properties and the relative amounts of the first and second polymers, a wide variety of such polymer blends can be produced. Of particular interest are polymer blends, also referred to as thermoplastic elastomers (TPE), in which the first polymer is a thermoplastic material. Such as polypropylene, and the second polymer is an elastomeric material. Such as an ethylene-propylene elastomer or an eth ylene-propylene-diene (EPDM) rubber. Examples of such thermoplastic elastomers include polypropylene impact copolymers, thermoplastic olefins and thermoplastic Vulca nizates.Unlike conventional Vulcanized rubbers, thermoplastic elastomers can be processed and recycled like thermoplastic materials, yet have properties and performance similar to that of …