Impact Modification of Polyamide 11 by the Reactive Blending with Epoxy Group Modified Polyethylene
Polyamide 11 (PA11) and epoxy group modified polyethylene (EGMA) were melt-blended in a segment mixer at 230 °C. The reactive nature of the blend is reflected in the mixing torque behavior of the blend at different compositions. The dynamic mechanical analysis reveals shifted glass transition temperatures for both PA11 and EGMA, indicating the improved miscibility by the reactive blending. Transmission electron microscopy (TEM) shows that EGMA is precisely dispersed in PA11 matrix with the domain size of several hundred nanometers for the reactive blends. The mechanical properties were also measured for the obtained material and it exhibits greatly improved impact strength as compared with the neat PA11. In addition, the toughening mechanism for the blend system was also studied.
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Document Type: Research Article
Publication date: 2006-12-01
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