title: Kinetics of volume change of poly(succinimide) gels during hydrolysis and swelling.
abstract: Kinetics of hydrolysis induced swelling as well as pure swelling of a novel class of pH responsive biocompatible polymer gels was studied. Poly(aspartic acid) gels were prepared by hydrolysis of chemically cross-linked poly(succinimide) networks. The volume change of spherical gels of different size, measured at constant pH, proceeds in three distinct processes: solvent exchange, hydrolysis and swelling. It turned out that pure swelling as well as the swelling coupled with hydrolysis can be described by the Tanaka-Fillmore-Peters-Candau theory. The relaxation times as well as the cooperative diffusion coefficient of the network chains were determined. It was found that the initial condition of the swelling makes its influence felt neither on the relaxation time, nor on the cooperative diffusion coefficient.
authors: Semmelweis University, Faculty of Medicine, Department of Biophysics and Radiation Biology, H-1094, Budapest, Tűzoltó u.37-47, Hungary.
authors: Zsófia
authors: Z
authors: Varga
authors: Kristóf
authors: K
authors: Molnár
authors: Viktoria
authors: V
authors: Torma
authors: Miklós
authors: M
authors: Zrínyi
mesh_terms: D001224:Aspartic Acid / Q000031:analogs & derivatives* / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry; D005782:Gels / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007700:Kinetics; D010455:Peptides / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D005782:Gels; D010455:Peptides; C017645:polyaspartate; C025252:poly-DL-succinimide; D001224:Aspartic Acid