Modelling of mechanical behaviour of polyamide nanocomposite fibres using a three-phase Halpin-Tsai model

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Abstract

The aim of the present study is to correlate the features of the elongational flow-induced morphology to the mechanical properties of polyamide based nanocomposite fibres. Particular attention was paid to modelling the mechanical behaviour of the hybrids which were produced by fibre spinning technique and collected at different draw ratios. Tensile properties of as-spun and stretched fibres were investigated and correlated to their nanostructure through analytical techniques sensitive to different aspects of the hybrids morphology, such as X-Ray diffraction and TEM analysis. In particular, the TEM images of the nanocomposite systems showed intercalated/exfoliated morphology in all hybrids. For this reason, a three-phase Halpin-Tsai model, based on polyamide-6 matrix, exfoliated clay platelets and nanolayer intercalated clusters, was used to fit the experimental data. This method was applied to calculate the Young's modulus of nanocomposite fibres both as-spun and stretched ones. Moreover, the model was used for predicting the effect of various morphological parameters including the exfoliation degree, clay layer and cluster aspect ratio.

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Garofalo, E., Russo, G. M., Maio, L. D., & Incarnato, L. (2009). Modelling of mechanical behaviour of polyamide nanocomposite fibres using a three-phase Halpin-Tsai model. E-Polymers. https://doi.org/10.1515/epoly.2009.9.1.670

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