Toughening of glass fiber-reinforced nylon 66 with EPDM-MAH

摘要

In this research the variation of mechanical and rheologieal properties of the composite as a function of different processing parameters and EPDM content was studied. The optimum amount ofdicumyl peroxide (DCP) to achieve the highest percentage of grafting ofmaleic anhydride to EPDM was determind by FTIR spectroscopy. In general, immiseibility between nylon 66 and EPDM and their high interfacial tension makes their blending difficult. Maleic anhydride was grafted to EPDM to reduce interfacial tension between the two phases. Also the blends were prepared at the highest possible mixing speed (screw speed in extrusion) and lowest temperature to reach a well mixed sample which can be seen in SEM images and impact strength results. DMTA tests were conducted to evaluate the misei-bility of the components and to measure the glass transition temperature of the blends. Rheologieal measurements showed the viscosities of the blend components getting closer to each other when EPDM content, time of mixing, and shear rate increase.