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Related Experiment Videos

Kinetics of nonisothermal polymer crystallization.

Jiao Yang1, Benjamin J McCoy, Giridhar Madras

  • 1Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, USA. ishida@ims.ac.jp

The Journal of Physical Chemistry. B
|July 21, 2006
PubMed
Summary

This study models nonisothermal polymer crystallization kinetics using a cluster size distribution approach. Results show cooling rates and initial temperatures significantly impact crystallization, validating the model against experimental data.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Chemical Engineering

Background:

  • Nonisothermal polymer crystallization is crucial for material properties.
  • Understanding crystallization kinetics under varying conditions is essential.
  • Existing models may not fully capture complex phenomena like Ostwald ripening.

Purpose of the Study:

  • To investigate nonisothermal polymer crystallization kinetics.
  • To model the time dependencies of crystal formation and growth.
  • To evaluate the influence of cooling rates and initial temperatures on crystallization.

Main Methods:

  • Adoption of a cluster size distribution model.
  • Analysis of time dependencies for polymer concentration, crystal number/size, and crystallinity.

Related Experiment Videos

  • Investigation of incubation periods at varied cooling rates and initial temperatures.
  • Comparison of moment and numerical solutions for population balance equations.

    • Main Results:

    • Time dependencies of polymer concentration, crystal size, and crystallinity were determined for various cooling rates.
    • The incubation period's relationship with cooling rates and initial temperatures was analyzed.
    • Ostwald ripening's influence was observed through comparisons of modeling solutions.
    • Model predictions showed good agreement with experimental measurements.

    Conclusions:

    • The cluster size distribution model effectively describes nonisothermal polymer crystallization kinetics.
    • Cooling rates and initial temperatures are critical factors influencing crystallization.
    • The model's accuracy is supported by its agreement with experimental data.