Colloid and Polymer Science

, Volume 283, Issue 6, pp 681–690 | Cite as

Poly(2-hydroxyethyl acrylate) hydrogel confined in a hydrophobous porous matrix

  • G. Gallego Ferrer
  • J. M. Soria Meliá
  • J. Hernández Canales
  • J. M. Meseguer Dueñas
  • F. Romero Colomer
  • M. Monleón Pradas
  • J. L. Gómez Ribelles
  • P. Pissis
  • G. Polizos
Original Contributions

Abstract

A series of interpenetrated polymer networks (IPNs) in which the first component is a porous poly(ethyl methacrylate) (PEMA) hydrophobic network and the second one is a poly(2-hydroxyethyl acrylate) (PHEA) hydrophilic network were synthesized. Equilibrium sorption isotherms can be reduced to a single master curve for all the IPNs when the water absorbed is expressed per gram of PHEA in them. The equilibrium water sorption in immersion is always much smaller than that of pure PHEA. This feature is due to the confining effect of the stiff PEMA matrix. The plasticizing effect of the absorbed water on the PHEA phase was characterized using thermally stimulated depolarization currents, dynamic-mechanical analysis and dielectric relaxation spectroscopy. The results show that the shift of the main relaxation peak towards lower temperatures is unaffected by the presence of the PEMA matrix, and only depends on the water content per gram of PHEA in the IPN.

Keywords

Interpenetrated polymer networks Hydrogels Water sorption isotherms Dynamic-mechanical analysis Plasticization 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • G. Gallego Ferrer
    • 1
  • J. M. Soria Meliá
    • 1
  • J. Hernández Canales
    • 1
  • J. M. Meseguer Dueñas
    • 1
  • F. Romero Colomer
    • 1
  • M. Monleón Pradas
    • 1
  • J. L. Gómez Ribelles
    • 1
  • P. Pissis
    • 2
  • G. Polizos
    • 2
  1. 1.Centre for BiomaterialsUniversidad Politécnica de ValenciaValenciaSpain
  2. 2.Department of PhysicsNational Technical University of AthensAthensGreece

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