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Polymers 2018, 10(7), 717; https://doi.org/10.3390/polym10070717

Impact Strength and Water Uptake Behaviors of Fully Bio-Based PA11-SGW Composites

1
Group LEPAMAP, Department of Chemical Engineering, University of Girona, C/M. Aurèlia Capmany, 61, 17003 Girona, Spain
2
Design, Development and Product Innovation, Department of Organization, Business Management and Product Design, University of Girona, C/M. Aurèlia Capmany, 61, 17003 Girona, Spain
3
Department of Materials Science and Metallurgy, Textile Engineering, Polytechnic University of Catalonia, C/Colom, 11, 08222 Terrassa, Spain
*
Author to whom correspondence should be addressed.
Received: 24 May 2018 / Revised: 21 June 2018 / Accepted: 27 June 2018 / Published: 29 June 2018
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Abstract

Composite materials have attracted the attention of some industrial fields due to their lightness and relatively good mechanical properties. One of these properties is impact strength, essential to ensure the processability and application of these materials under impact conditions. In addition, it is known that water absorption has a plasticizing effect in polymers and polymer composites which can change the properties of such materials and limit their use. Moreover, this effect worsens when hydrophilic reinforcement is used. In this work, the impact and water uptake behavior of totally bio-based composites from polyamide 11 (PA11) and lignocellulosic pine fibers mechanically processed as stone groundwood (SGW) were studied. The impact resistance of PA11 and its composites was higher than expected, obtaining better results than those of polyolefin-based materials. The evaluated mechanical properties and the micrographs showed an adequate interface. The water uptake test showed that PA11 and its composites had non-Fickian and Fickian case I behaviours, respectively. It was found that the maximum water absorbance was similar to that of SGW reinforced polypropylene. View Full-Text
Keywords: bio-based composites; polyamide 11; lignocellulosic fibers; impact properties; water uptake bio-based composites; polyamide 11; lignocellulosic fibers; impact properties; water uptake
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Oliver-Ortega, H.; Méndez, J.A.; Espinach, F.X.; Tarrés, Q.; Ardanuy, M.; Mutjé, P. Impact Strength and Water Uptake Behaviors of Fully Bio-Based PA11-SGW Composites. Polymers 2018, 10, 717.

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