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Simha-Somcynsky Equation of State Modeling of the PVT Behavior of PP/Clay-Nanocomposite/CO2 Mixtures

  • M. M. Hasan and C. B. Park
Published/Copyright: August 12, 2014
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Abstract

The Pressure-Volume-Temperature (PVT) property of polymer nanocomposite (PNC)/gas solutions is an important fundamental property in the foaming of PNC. However, accurate data have not yet been reported. We examined the PVT behaviors of polypropylene (PP) and PP/organoclay polymer nanocomposite (PP-PNC) by monitoring the swelling changes of the polymer melt in supercritical carbon dioxide (scCO2). A model was adopted that describes the PVT behaviors of PP-PNC with and without dissolved gas. Based on the model, a PNC consists of two sections: a hard section (a nanoparticle surrounded by solidified polymer) and a soft section (neat polymer). It was observed that an infusion of nanoparticles decreased the swelling. It seems that the hard section had a minimal free volume in which to dissolve the blowing agents, and that the number of hard sections increased with the infusion of nanoparticles. As a result, the total gas absorption capacity of the system decreased, and consequently, the swelling also decreased.


* Mail address: Chul B. Park, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering University of Toronto, Toronto, Ontario Canada, M5S 3G8, E-mail:

Editor's Note: This contribution was submitted for the Special Edition of IPP to honor Dr. L. Utracki (Issue 1, 2014).


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Received: 2013-05-13
Accepted: 2014-04-18
Published Online: 2014-08-12
Published in Print: 2014-08-14

© 2014, Carl Hanser Verlag, Munich

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  1. Contents
  2. Contents
  3. Invited Papers
  4. Simha-Somcynsky Equation of State Modeling of the PVT Behavior of PP/Clay-Nanocomposite/CO2 Mixtures
  5. Regular Contributed Articles
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