Poly(2-hydroxyethyl acrylate) hydrogel confined in a hydrophobous porous matrix
| Autor: | J.L. Gómez Ribelles, J. M. Soria Meliá, J. M. Meseguer Dueñas, Georgios Polizos, J. Hernández Canales, Gloria Gallego Ferrer, M. Monleón Pradas, F. Romero Colomer, Polycarpos Pissis |
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| Rok vydání: | 2004 |
| Předmět: |
Acrylate
Materials science Absorption of water Polymers and Plastics Radical polymerization Sorption Methacrylate chemistry.chemical_compound Colloid and Surface Chemistry chemistry Phase (matter) Polymer chemistry Self-healing hydrogels Materials Chemistry Interpenetrating polymer network Physical and Theoretical Chemistry |
| Zdroj: | Colloid and Polymer Science. 283:681-690 |
| ISSN: | 1435-1536 0303-402X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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