Abstract
Light scattering measurements were made of glutaraldehyde (GA)-cured gelatin gels. Gel modulus, which was found by intensity measurements of scattered light, decreased with increasing GA content, and the autocorrelation function of dynamic light scattering could be reproduced by a double-exponential fitting. The diffusion constant of the fast mode was proportional to gelatin concentration, C e, to the power of 0.79, while the correlation length of the slow mode hardly depended on C e. These facts suggested that GA curing may not influence the size of crystalline triple-helical structure but depresses the number of nucleation sites, which leads to lowering of the total crosslink density. Further, chemical and/or physical crosslink densities of GA-cured gelatin gels were estimated roughly by using swelling ratio data.
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