Fox equation

The Fox equation is an equation for describing the glass transition temperature of mixtures with two components as a function of the respective mass fractions .

properties

The Fox equation is:

${\displaystyle T_{\rm {g}}=T_{\rm {g_{1}}}(w_{1})+T_{\rm {g_{2}}}(w_{2})}$

with as the glass transition temperature of the mixture, and as the mass fractions of the two components, and as the glass transition temperature of the two components (that of water is −135 ° C). In contrast to the Gordon-Taylor equation , the Fox-Flory equation does not take intermolecular interactions into account . ${\displaystyle T_{\rm {g}}}$ ${\displaystyle w_{1}}$ ${\displaystyle w_{2}}$ ${\displaystyle T_{\rm {g_{1}}}}$ ${\displaystyle T_{\rm {g_{2}}}}$

history

The Fox equation was published in 1956 by Thomas G. Fox. The Flory-Fox equation was established by the same author in 1950 .

Individual evidence

1. ↑ ^{a b} Michael Niaounakis: Biopolymers: Processing and Products. William Andrew, 2014, ISBN 978-0-323-27938-3 , p. 117.
2. ↑ Patrick F. Fox: Advanced Dairy Chemistry Volume 3. Springer Science & Business Media, 1992, ISBN 978-0-412-63020-0 , p. 316.
3. ↑ Thomas G. Fox: Influence of Diluent and of Copolymer Composition on the Glass Temperature of a Polymer System. In: Bull. Am. Phys. Soc. (1956), Volume 1, p. 123.