화학공학소재연구정보센터
Journal of Physical Chemistry, Vol.98, No.43, 11115-11118, 1994
Volume Phase-Transition of Thermosensitive Polymer Gels and Mechanism for Miscibility
Temperature-dependent volume changes of the sodium methacrylate (SMA)/acrylamide (A)/N,N’-methylenebisacrylamide (Bis) copolymer gel (SMA gel), sodium stylenesulfonate (SSS)/A/Bis copolymer gel (SSS gel), and sodium 2-acrylamido-2-methylpropanesulfonate (SAMPS)/A/Bis copolymer gel (SAMPS gel) immersed in acetone-water mixtures were examined, as well as solvent-dependent volume changes of the gels. Thermoswelling volume change was observed for the SMA gel and thermoshrinking volume change for SSS and SAMPS gels. The results were found to be consistent with miscibility of the gels in acetone-water mixtures. That is, miscibility as the ratio of hydrophobic to hydrophilic characteristic is a factor determining the pattern of thermoswelling or thermoshrinking volume phase transition.