Interaction between water and polymer chains in poly(hydroxyethyl acrylate) hydrogels |
| |
| Authors: | M. Monleón Pradas J. L. Gómez Ribelles A. Serrano Aroca G. Gallego Ferrer J. Suay Antón P. Pissis |
| |
| Affiliation: | (1) Center for Biomaterials Universidad Politécnica de Valencia Camino de Vera s/n 46071 Valencia, Spain, ES;(2) Deptartment of Technology 'Jaume I' University 12071 Castellón, Spain, ES;(3) Deptartment of Physics National Technical University of Athens Zografou Campus, 15780 Athens, Greece, GR |
| |
| Abstract: | Polymer networks of different cross-linking densities were prepared by copolymerisation of hydroxyethyl acrylate and ethylene glycol dimethacrylate. The average molecular weight between cross-links as well as the polymer chain mobility were characterised by means of dynamic–mechanical spectroscopy. Equilibrium sorption isotherms and the water uptake in immersion in liquid water allowed the determination of the Flory–Huggins interaction parameter between water molecules and polymer chain segments, which decreased with the water activity in the hydrogel and increased with the cross-linking density as a consequence of the hydrophobic character of the cross-linking agent. Dynamic sorption and desorption experiments were used to determine the diffusion coefficient. Received: 11 November 1999 Accepted: 28 July 2000 |
| |
| Keywords: | Hydrogels Water sorption Diffusion Poly(hydroxyethyl acrylate) Dynamic mechanical properties |
| 本文献已被 SpringerLink 等数据库收录！ |
