Multiscale Modeling and Simulation Platform for Materials and Life Sciences

J-OCTA

Multiscale Modeling and Simulation Platform for Materials and Life Sciences

J-OCTA

Flory-Huggins
χ Parameter
Phase Diagram
Spinodal Curve
Cloud Point

Estimation of χ Parameters from Phase Diagrams

Based on cloud point data for a polystyrene–polybutadiene mixture exhibiting a UCST-type phase diagram, the Flory–Huggins theory was used to estimate χ parameters. Since the system shows weak concentration dependence, a simplified formula was applied, and calculations were performed with J-OCTA’s optional tool. Coexistence and spinodal curves corresponding to experimental values were obtained.
Use Cases Highlights
  • Application of Flory–Huggins theory
  • Estimation of coexistence and spinodal curves from experimental data
  • Capability to consider concentration dependence

Comparison between phase diagrams and estimated results

Coexistence and spinodal curves obtained from volume fraction–temperature relationships are shown. χ parameters estimated by Flory–Huggins theory are consistent with experimental values.

Coexistence curve and spinodal curve against experimental data
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