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Zirconium phosphate changing hygroscopicity of polyamide-6 in nanocomposites PA-6/ZrP

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Abstract

Hygroscopicity can be understood as ability of any material to absorb water. This investigation aims to study the effect of lamellar zirconium phosphate (ZrP) in the hygroscopicity of poliamide-6 (PA-6). In situ (PA-6/ZrP) nanocomposites were prepared during the polymerization of caprolactam. Structural, thermal, crystallographic and rheological characteristics were assessed by infrared spectroscopy (FTIR), thermogravimetry, differential scanning calorimetry, wide-angle X-ray diffraction (WAXD), rheological and water absorption measurements. FTIR evidenced strong interaction between polymer/nanofiller. According to the kind of nanofiller, changes in PA-6 thermal stability and crystallinity degree were noticed. Formation of PA-6 α-crystal, microcomposite and possibly exfoliated nanocomposite was predicted by WAXD. Rheological measurements evidenced great interaction between PA-6 and nanofillers. PA-6 hygroscopicity was strongly influenced by ZrP-attained value almost 40% lesser as compared to neat PA-6.

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Acknowledgements

The authors thank Conselho Nacional Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Universidade Federal do Rio de Janeiro (UFRJ) for supporting this work.

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  1. Instituto de Macromoléculas Professora Eloisa Mano (IMA), Universidade Federal do Rio de Janeiro (UFRJ), Avenida Horácio Macedo, 2030 CT Bloco J, Ilha do Fundão, Rio de Janeiro, 21941-598, Brazil

    E. E. Garcia, D. F. S. Freitas, S. P. Cestari, D. R. Coval, L. C. Mendes & G. A. V. Albitres

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  1. E. E. Garcia
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  2. D. F. S. Freitas
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Correspondence to L. C. Mendes.

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Garcia, E.E., Freitas, D.F.S., Cestari, S.P. et al. Zirconium phosphate changing hygroscopicity of polyamide-6 in nanocomposites PA-6/ZrP. J Therm Anal Calorim 139, 293–303 (2020). https://doi.org/10.1007/s10973-019-08396-1

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