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Polymers 2017, 9(10), 522; https://doi.org/10.3390/polym9100522

Evaluation of Thermal and Thermomechanical Behaviour of Bio-Based Polyamide 11 Based Composites Reinforced with Lignocellulosic Fibres

1
Group LEPAMAP, Department of Chemical Engineering, University of Girona, C/M.Aurèlia Capmany, 61, 17003 Girona, Spain
2
Design, Development and Product Innovation, Dpt. Organization, Business Management and Product Design, University of Girona, C/M.Aurèlia Capmany, 61, 17003 Girona, Spain
3
Departament de Ciència dels Materials i Enginyeria Metal.lúrgica, Secció Enginyeria Tèxtil, Universitat Politècnica de Catalunya, C/Colom, 11, 08222 Terrassa, Barcelona, Spain
*
Author to whom correspondence should be addressed.
Received: 14 September 2017 / Revised: 13 October 2017 / Accepted: 16 October 2017 / Published: 18 October 2017
(This article belongs to the Special Issue Bio-inspired and Bio-based Polymers)
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Abstract

In this work, polyamide 11 (PA11) and stone ground wood fibres (SGW) were used, as an alternative to non-bio-based polymer matrices and reinforcements, to obtain short fibre reinforced composites. The impact of the reinforcement on the thermal degradation, thermal transitions and microstructure of PA11-based composites were studied. Natural fibres have lower degradation temperatures than PA11, thus, composites showed lower onset degradation temperatures than PA11, as well. The thermal transition and the semi-crystalline structure of the composites were similar to PA11. On the other hand, when SGW was submitted to an annealing treatment, the composites prepared with these fibres increased its crystallinity, with increasing fibre contents, compared to PA11. The differences between the glass transition temperatures of annealed and untreated composites decreased with the fibre contents. Thus, the fibres had a higher impact in the composites mechanical behaviour than on the mobility of the amorphous phase. The crystalline structure of PA11 and PA11-SGW composites, after annealing, was transformed to α’ more stable phase, without any negative impact on the properties of the fibres. View Full-Text
Keywords: polyamide 11; lignocellulosic fibres; thermomechanical behaviour; annealing; microstructure polyamide 11; lignocellulosic fibres; thermomechanical behaviour; annealing; microstructure
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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.; Mutjé, P.; Tarrés, Q.; Espinach, F.X.; Ardanuy, M. Evaluation of Thermal and Thermomechanical Behaviour of Bio-Based Polyamide 11 Based Composites Reinforced with Lignocellulosic Fibres. Polymers 2017, 9, 522.

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