Relationships between nanostructure and thermomechanical properties in poly(vinyl alcohol)/montmorillonite nanocomposite with an entrapped polyelectrolyte |
| |
| Authors: | Caio M Paranhos Karim Dahmouche Soraia Zaioncz Bluma G Soares Luiz A Pessan |
| |
| Institution: | 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;3. Department of Materials Engineering, Federal University of São Carlos. Rod. Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil |
| |
| 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 |
| |
| Keywords: | hydrogels nanocomposites poly(vinyl alcohol) small angle X-ray scattering (SAXS) |
|
|
