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Physical characterization of some copolyamide/ethylene propylene diene rubber (EPDM) blends

R. N. DARIE1,* , M. ZANOAGA1, C. VASILE1

Affiliation

  1. “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487, Iasi, Romania

Abstract

In order to understand the processing-mechanical-property relationships, the effects of adding a small amount of maleated ethylene-propylene rubber (EP-g-MA) on the rheological properties of some copolyamide/EPDM blends were evaluated. The changes of the dynamic rheological parameters and some processing characteristics show that the blends with EP-g- MA display a different behavior from that of the homopolymer blend, viscoelastic measurements being sensitive to the composition of the blends. The obtained data showed the incompatibility of the binary coPA/EPDM blends due to the structural difference of the components. Better processability resulted because of high melt flow rate of coPA and increased mobility of elastomer macromolecules. The presence of EP-MA in the blend leads to the enhancement of the interfacial viscosity and adhesion due to the intermolecular interaction between the functional groups of the blend components produced during processing, the experimental curves corresponding to the loss and storage moduli as well as dynamic viscosity for uncompatibilized and mainly compatibilized blends are higher than those calculated by the additivity rules..

Keywords

Copolyamide, Elastomer, Ethylene propylene diene rubber (EPDM) blend.

Submitted at: Nov. 2, 2006
Accepted at: April 15, 2007

Citation

R. N. DARIE, M. ZANOAGA, C. VASILE, Physical characterization of some copolyamide/ethylene propylene diene rubber (EPDM) blends, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 1038-1043 (2007)