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Influence of Coupling Agents on Melt Flow Behavior of Natural Fiber Composites

✍ Scribed by Velichko Hristov; John Vlachopoulos

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
534 KB
Volume
292
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

The influence of coupling agents on the melt rheological properties of natural fiber composites has been investigated in this work using capillary and rotational rheometers. Scanning electron microscopy was also employed to supplement the rheological data. It was found that molecular weight and molecular weight distribution of the polymer matrix and coupling agent characteristics influence the filler wetting and the melt flow properties of the filled composites. Generally, low molecular weight and narrow molecular weight distribution polyethylene matrix provides relatively larger increase of the viscosity of the composites. Coupling agents tend to increase the resistance to shearing, but wall slip effects may interfere with the measured values, especially at very high filler loadings. Entrance pressure loss in capillaries is also influenced by polymer matrix and coupling agent used.

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