Structure Formation Due to Non-Equilibrium Liquid-Liquid Phase Separation in Polypropylene Solutions

  • Hwan K. Lee
  • Allan S. Myerson
  • Kalle Levon


The morphology of polymeric materials1 is strongly influenced by liquid-liquid phase separation and crystallization. In general, there is a possibility that the liquid-liquid phase separation process is coupled with the crystallization process. The equilibrium state of semicrystalline polymer-solvent mixtures is presented by depiction with the phase diagrams as shown in Figure 1. The liquid-liquid phase separation region is located above and below the equilibrium liquid-solid transition with poor and good solvents, respectively. The cooperation of two phenomena which both depend on the non-equilibrium conditions may produce new structures, which are important from both scientific and industrial points of view.


Spinodal Decomposition Growth Front Isotactic Polypropylene Liquid Phase Separation Phase Separation Process 
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Copyright information

© Springer Science+Business Media New York 1993

Authors and Affiliations

  • Hwan K. Lee
    • 1
  • Allan S. Myerson
    • 1
  • Kalle Levon
    • 2
  1. 1.Department of Chemical EngineeringPolytechnic UniversityBrooklynUSA
  2. 2.Department of ChemistryPolytechnic UniversityBrooklynUSA

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