TY - JOUR
T1 - Poly(2-hydroxyethyl acrylate) hydrogel confined in a hydrophobous porous matrix
AU - Gallego Ferrer, G.
AU - Soria Meliá, J. M.
AU - Hernández Canales, J.
AU - Meseguer Dueñas, J. M.
AU - Romero Colomer, F.
AU - Monleón Pradas, M.
AU - Gómez Ribelles, J. L.
AU - Pissis, P.
AU - Polizos, G.
PY - 2005/3
Y1 - 2005/3
N2 - 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.
AB - 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.
KW - Dynamic-mechanic alanalysis
KW - Hydrogels
KW - Interpenetrated polymer networks
KW - Plasticization
KW - Water sorption isotherms
UR - http://www.scopus.com/inward/record.url?scp=15244342661&partnerID=8YFLogxK
U2 - 10.1007/s00396-004-1208-y
DO - 10.1007/s00396-004-1208-y
M3 - Article
AN - SCOPUS:15244342661
SN - 0303-402X
VL - 283
SP - 681
EP - 690
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 6
ER -