Relationships between nanostructure and thermomechanical properties in poly(vinyl alcohol)/montmorillonite nanocomposite with an entrapped polyelectrolyte

Authors

  • Caio M. Paranhos,

    Corresponding author
    1. Institute of Macromolecules, Federal University of Rio de Janeiro. Centro de Tecnologia, Bloco J, 21945-970 Ilha do Fundão, Rio de Janeiro, RJ, Brazil
    2. State University of Zona Oeste, Av. Manuel Caldeira de Alvarenga 1203, 23070-200 Campo Grande, Rio de Janeiro, RJ, Brazil
    • Institute of Macromolecules, Federal University of Rio de Janeiro. Centro de Tecnologia, Bloco J, 21945-970 Ilha do Fundão, Rio de Janeiro, RJ, Brazil
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  • Karim Dahmouche,

    1. State University of Zona Oeste, Av. Manuel Caldeira de Alvarenga 1203, 23070-200 Campo Grande, Rio de Janeiro, RJ, Brazil
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  • Soraia Zaioncz,

    1. Institute of Macromolecules, Federal University of Rio de Janeiro. Centro de Tecnologia, Bloco J, 21945-970 Ilha do Fundão, Rio de Janeiro, RJ, Brazil
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  • Bluma G. Soares,

    1. Institute of Macromolecules, Federal University of Rio de Janeiro. Centro de Tecnologia, Bloco J, 21945-970 Ilha do Fundão, Rio de Janeiro, RJ, Brazil
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  • Luiz A. Pessan

    1. Department of Materials Engineering, Federal University of São Carlos. Rod. Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil
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Abstract

Poly(vinyl alcohol)/montmorillonite (PVA/MOM) hydrogels containing coacervated microparticles of sulfonated polyester (PES) were prepared by direct mixture of the components in water. The system was characterized by using differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), and dynamical mechanical analysis (DMA). The influence of PES and MOM on the microstructure of the nanocomposite hydrogels was established. The presence of PES causes a significant change on the crystallinity of PVA. Furthermore, the presence of MOM leads to a hierarchical nanostructure that also contributes to change the crystallinity of PVA. The results of structural investigation are correlated with the mechanical properties of the composites obtained by DMA. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 2618–2629, 2008

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