Role Of Free Volume Research Articles

Positron lifetimes and phase transitions in solids

Lifetimes of positrons annihilating in NH4Cl and in nitrate glasses have been measured as a function of temperature. The observed temperature dependence of tau 2 and I2 indicates that the I2 is significantly affected by changes in molar volumes accompanying the phase transitions in these solids. I2 varies in the same direction as the molar volume thus underlining the role of free volume in the positron annihilation process in condensed media.

Role of free volume in polymer solution thermodynamics

Abstract

Role of Free Volume in the Pressure Dependence of the Viscosity of Liquids

The free-volume theory of liquid viscosities has been extended to account for the dependence of viscosity on pressure. The limiting specific volume of a liquid has an expansion coefficient and a compressibility similar to those of a solid.