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Polymer Bulletin

, Volume 77, Issue 2, pp 929–948 | Cite as

Thermal characterization by DSC and TGA analyses of PVA hydrogels with organic and sodium MMT

  • Fatiha ReguiegEmail author
  • Lucia Ricci
  • Nabahat Bouyacoub
  • Mohamed Belbachir
  • Monica Bertoldo
Original Paper
  • 117 Downloads

Abstract

Polyvinyl alcohol (PVA) hydrogels were prepared by a cyclic freezing–thawing technique without any cross-linker agent, using PVA and Maghnite water dispersion with different ratios. The obtained results have shown a higher thermal stability of samples with sodium than with alkylammonium Maghnite. Furthermore, thermal stability was maximum at the lowest investigated Maghnite/PVA ratio, but higher than for the pure PVA at all the investigated compositions. DSC analysis has shown both a low crystal degree and a low heat capacity jump at the glass transition temperature for samples with high Maghnite content. This phase does not seem to depend on the kind of cations, sodium or alkylammonium into the gallery of the clay.

Notes

Acknowledgement

The author thanks Pr. A. Bendiaballah for his help in English language.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Laboratory of Polymer Chemical, Department of Chemistry, Faculty of Exact and Applied SciencesUniversity of Oran1 Ahmed BenbellaOranAlgeria
  2. 2.Ecole superieure en génie electrique et énergétique d’ OranOranAlgeria
  3. 3.Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche (CNR-IPCF)PisaItaly
  4. 4.Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche (CNR-ISOF)BolognaItaly

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