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High-performance composite with negative Poisson’s ratio

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Abstract

This article presents innovative work undertaken to evaluate the auxetic composite materials developed using weft-knitted fabrics with negative Poisson’s ratio (NPR) produced from high-tenacity filaments of para-aramid (p-AR) and polyamide. The aim of this study is to develop polymeric composite materials reinforced with auxetic knitted fabrics and to evaluate the degree of transference of the auxetic behavior from the fibrous reinforcement to the composite produced. The results show that the NPR values remained in the composites. Regardless of the type of resin used, either epoxy or polyester, the highest values were obtained for samples produced with p-AR auxetic knitted fabrics. The NPR composites developed within this work present great potential for applications in industrial areas, including personal protection products, such as bulletproof vests, helmets, knee, and elbow protectors, and in all other areas where energy absorption is a key factor to be considered.

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ACKNOWLEDGMENTS

We gratefully acknowledge the financial support from CAPES Foundation, Ministry of Education of Brazil, Caixa Postal 250, Brasília – DF 70040-020, Brazil, for the doctoral grant BEX 0978/12-4 and the Teijin Company for the TWARON® yarn.

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Correspondence to Fernanda Steffens.

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The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript.

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Steffens, F., Oliveira, F.R., Mota, C. et al. High-performance composite with negative Poisson’s ratio. Journal of Materials Research 32, 3477–3484 (2017). https://doi.org/10.1557/jmr.2017.340

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  • DOI: https://doi.org/10.1557/jmr.2017.340

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