Abstract
The rheological behavior of composites made with low-density polyamide 11 (PA11) and high yield pulp fibre (HYP) is evaluated. The rheological properties of high-yield, pulp-reinforced bio- based Nylon 11 HYP/PA11 composite were investigated using a capillary rheometer. The rheological tests were realized in function of the shear rate for different temperature conditions. The experimental results showed that identically for fibre content and aspect ratio, the shearing effects decreased as the temperature increased; that is, the HYP/PA11 became more non-Newtonian in the higher temperature region, which corresponds to the high pseudoplasticity of the HYP/PA11. At low HYP content, the shear viscosity is expected to increase rapidly with increasing concentrations of the fibres because of the rapidly increasing interactions between particles as they become more closely packed. However, at very high fibre content, random anisotropic structure of the fibres in polymer melts is created. The increase in shear viscosity is greater at lower shear rates, where fibre and polymer molecules are not completely oriented.
Highlights
Green-fibre-reinforced thermoplastic composites are in high demand in the automotive, aerospace, and construction industries
The high-yield pulp “high yield pulp fibre (HYP)” fibres derived from hardwood that were used in this study are short semicrystalline fibres
This study demonstrates that it is possible to extrudate natural fibre with high-thermoplastic-engineering biobased nylon
Summary
Green-fibre-reinforced thermoplastic composites are in high demand in the automotive, aerospace, and construction industries. Other reasons for the high demand for the utilization of green fibres are their low density and good thermal and acoustic properties [2]. Do not abrade processing tools [2] [3]. Short-fibre reinforced polymer composites are extensively used in manufacturing industries due to their light weight and superior mechanical properties [4]-[6]. Pulp fibre has been used for its low lignin content and for its potential thermal stability and its strong adhesion when bonded with high-temperature engineering thermoplastic polymers [7]-[10]. The high-yield pulp “HYP” fibres derived from hardwood that were used in this study are short semicrystalline fibres
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