Interfacial tension theory for low molecular weight and polymer systems
This work reports on the development of an interfacial tension theory applicable to low molecular weight fluids and polymer systems. The theoretical treatment includes a rederivation of the free energy minimization formalism for inhomogeneous systems in the gradient approximation. The gradient approach is then combined with a slightly modified version of the lattice fluid model. The resulting theory describes liquid-vapor and liquid-liquid interfaces of pure and mixed nonpolar and slightly polar systems away from the critical region. The interfacial equations are amenable to numerical evaluation, and the theoretical predictions were tested against experiment for the cases of pure components and binary mixtures.
- OSTI ID:
- 5691833
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
BINARY MIXTURES
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY
FLOW MODELS
FLUIDS
FREE ENERGY
GASES
INTERFACES
LIQUIDS
MATHEMATICAL MODELS
MIXTURES
MOLECULAR WEIGHT
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
POLYMERS
SURFACE PROPERTIES
SURFACE TENSION
THERMODYNAMIC PROPERTIES
VAPORS