Study of the concentration dependence of the thermal and thermoelastic properties of gelatin gels

Godovskii, Yu.K.; Mal'tseva, I.I.; Slonimskii, G.L.

doi:10.1016/0032-3950(71)90127-4

Cited by 6 publications

(1 citation statement)

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“…On cooling, amorphous gelatin is transformed into the glassy state at a temperature depending on the water content in the sample [1][2][3]. However, the glass transition in gelatin has so far been studied for a relatively narrow range of concentrations and in a limited temperature range.…”

Section: Introductionmentioning

confidence: 99%

DSC study of melting and glass transition in gelatins

Tseretely

Smirnova

1992

Journal of Thermal Analysis

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In the range from -50 ~ to +130~ the temperature dependence of the heat capacity for different kinds of gelatins with water contents of from 2 to 95% was studied by the DSC method. It was shown that, in all studied eases, metastable collagen-like structures are formed in gels or crystalline gelatins, with thermodynamic parameters depending on the formation conditions. The characteristic properties of the glass transitions in amorphous gelatins and crystalline gelatins with different melting heats and different contents of the ordered phase were established. Special attention is paid to the structural properties of free and bound water. The dependence of the glass transition temperature Tg on the bound water content was shown to be of general applicability for many denatured biopolymers. Free water in gelatins, in distinction to the bound water, does not act as a plasticizer, but forms a rigid matrix inhibiting the glass transition.

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Section: Introductionmentioning

confidence: 99%