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Self-diffusion of water in unhardened photographic gelatin is measured by pulsed-gradient n.m.r. spectroscopy. Mutual diffusion and activity of water in hardened and unhardened gelatin is measured by step-change gravimetric sorption methods. Predictions of mutual diffusion from the self-diffusion data and published thermodynamic data by using the Vrentas-Duda theory are in agreement with the measured mutual diffusivities. Hardening (i.e. crosslinking) of the gelatin reduces the diffusivity as predicted by an extension to the Vrentas-Duda theory. The water activity increases with crosslinking.

Посилання на статтю:

Mutual and self-diffusion of water in gelatin: experimental measurement and predictive test of free-volume theory / Robert A. Yapel and J. Larry Duda and Xiaohong Lin // Polymer. – 1994. – Vol 35. – P. 2411-2416.

Mutual and self-diffusion of water in gelatin: experimental measurement and predictive test of free-volume theory - Завантажити.