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Related Experiment Videos

Temperature effects for isothermal polymer crystallization kinetics.

Jiao Yang1, Benjamin J McCoy, Giridhar Madras

  • 1Department of Chemical Engineering, Louisiana State University, Baton Rouge, 70803, USA.

The Journal of Chemical Physics
|July 23, 2005
PubMed
Summary
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This study models polymer crystallization, revealing temperature

Area of Science:

  • Polymer Science
  • Materials Science
  • Physical Chemistry

Background:

  • Understanding polymer crystallization is crucial for material properties.
  • Temperature significantly influences nucleation and crystal growth kinetics.
  • Existing models often simplify temperature-dependent parameters.

Purpose of the Study:

  • To investigate the impact of temperature on homogeneous nucleation and crystal growth during isothermal polymer crystallization.
  • To develop and apply a cluster size distribution model incorporating temperature-dependent parameters.
  • To analyze the denucleation (Ostwald ripening) phenomenon in polymer crystallization.

Main Methods:

  • Utilized a cluster size distribution model.
  • Incorporated temperature dependencies for interfacial energy, nucleation rate, growth/dissociation coefficients, and solubility.

Related Experiment Videos

  • Solved population balance equations using moment and numerical methods.
  • Compared model predictions with experimental data.

    • Main Results:

    • Presented time dependencies of polymer concentration, crystal number/size, and crystallinity (Avrami plots) at various temperatures.
    • Demonstrated the denucleation (Ostwald ripening) effect.
    • Achieved good agreement with experimental data, highlighting the necessity of strong temperature dependence in crystal-melt interfacial energy.

    Conclusions:

    • The cluster size distribution model effectively captures temperature effects in polymer crystallization.
    • Strong temperature dependence of crystal-melt interfacial energy is critical for accurate modeling.
    • The model provides insights into nucleation, growth, and ripening phenomena.