Effect of Pressure on Polymer Blend Miscibility: A Temperature-Pressure Superposition

Published

January 14, 1998

Author(s)

M Rabeony, D J. Lohse, R T. Garner, S J. Han, W W. Graessley, Kalman D. Migler

Abstract

In recent years there has been an increase in the effect of pressure on the miscibility of polymers^1-4. One reason is the need for such data to more fully understand polymer miscibility in relation to the various proposed theories and equations of state. Another is the realization that such pressure effects could be important in many situations where such blends are used, e. g., when mixing a blend in an extruder or in forming articles from a blend by injection molding. These needs have led to the development of pressure cells that can be used with both light and neutron scattering so that the phase behavior and interaction strengths of blends can be measured^2.5. In past work, we have found a wide range of phase behavior at atmospheric pressure in saturated hydrocarbons blends^6-11. As several outstanding problems remain unexplained in these blends, we decided to investigate the dependence of pressure: an independent thermodynamic variable. In this note, we wish to point out that in certain simple cases, the pressure and temperature dependence of the interaction parameter collapse as function of density.

Citation

Macromolecules

Volume

31

Pub Type

Journals

Keywords

blend, polymer, pressure, small angle neutron scattering

Citation

Rabeony, M. , Lohse, D. , Garner, R. , Han, S. , Graessley, W. and Migler, K. (1998), Effect of Pressure on Polymer Blend Miscibility: A Temperature-Pressure Superposition, Macromolecules (Accessed June 30, 2024)