Abstract
AbstractThe effects of amidation on the hardening reaction of lime processed gelatin with formaldehyde were studied by measuring the sol fraction and its molecular weight distribution in hardened gelatin films. It was shown that the swelling and sol fraction of the amidated gelatin hardened with formaldehyde was similar to those of acid processed gelatin. However, the molecular weight distribution of the sol fraction from ami-dated gelatin at the initial stage of storage was almost the same as that of the original gelatin and different from that of acid processed gelatin. The hardening reactivity of the amidated gelatin was different from acid processed gelatin.
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