Glass/rubber transitions and heat capacities of binary sugar blends
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 85 (9) , 2945-2951
- https://doi.org/10.1039/f19898502945
Abstract
The pairs of sugars glucose–fructose and fructose–sucrose have been comelted and quenched to form binary glasses. Glass-to-rubber transition temperatures Tg and heat capacities of the glasses and the crystalline sugars have been measured by computer-aided differential scanning calorimetry. Tg was found to vary smoothly with glass composition and the (constant pressure) heat capacities C of the glasses and rubbers varied monotonically with Tg. It is suggested that C is a better and experimentally more convenient indicator of Tg and the glassy state than is the inferred viscosity in terms of which Tg is usually defined. The Tg data for mixtures extrapolate smoothly to a Tg of fructose of 286 K which differs substantially from the value (373 K) previously reported. C values for the crystalline sugars agree with literature data.This publication has 1 reference indexed in Scilit:
- Water Science Reviews 3Published by Cambridge University Press (CUP) ,1988