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Rheology-morphology relationships in nylon 6/liquid-crystalline polymer blends

✍ Scribed by F. P. La Mantia; A. Valenza; M. Paci; P. L. Magagnini

Publisher
Society for Plastic Engineers
Year
1990
Tongue
English
Weight
642 KB
Volume
30
Category
Article
ISSN
0032-3888

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✦ Synopsis

Abstract

Extrusion measurements have been carried out on blends of nylon 6 and a liquid‐crystalline copolyesteramide (LCP). The flow curves at low temperature show a behavior similar to that of pure LCP with a rapid rise of the viscosity at low shear rates. At high shear rates the viscosity is lower than that for each of the two components. This minimum has been attributed to the lack of interactions between the two phases and to the formation of fibrils of the LCP phase. The SEM analysis shows, indeed, that fibrils of the LCP phase are produced in the convergent flow at the inlet of the capillary at high shear rates. These fibrils are lost during the flow in the long capillary.

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