Blends of ionomers

✍ Scribed by Santanu Datta; P. P. De; S. K. De

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 586 KB
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960906)61:10<1839::aid-app26>3.0.co;2-w

✦ Synopsis

Blends of zinc oxide-neutralized maleated EPDM terpolymer, (m-EPDM) and zinc salt of an ethylene-methacrylic acid copolymer, (Zn-EMA), wherein Zn-EMA does not exceed 50% by weight, behave as an ionic thermoplastic elastomer. A typical 60/40 m-EPDM/ Zn-EMA blend has the following properties: 100% modulus, 5.53 MPa; tensile strength, 12.10 MPa; elongation a t break, 220%; and tension set at 100% elongation, 29%. Properties of the blends are greater than those predicted by the additivity rule. Dynamic mechanical and infrared spectroscopic studies revealed that the ionic bonds are formed at the interfaces of m-EPDM and Zn-EMA, which facilitates formation of the technologically compatible blend.