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NAMS 2002 Workshop - ICOM 2008

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Membrane Modeling II - Gas Separation – 2<br />

Tuesday July 15, 3:00 PM-3:30 PM, O’ahu/Waialua<br />

Molecular Modeling of Free Volume in Poly (pyrrolone-imide) Copolymers<br />

X. Wang (Speaker), University of California Berkeley, Berkeley, California, USA -<br />

xywangz@berkeley.edu<br />

I. Sanchez, University of Texas at Austin, Austin, Texas, USA<br />

B. Freeman, University of Texas at Austin, Austin, Texas, USA<br />

Poly (pyrrolone-imide) copolymers, ultra-rigid polymers which can mimic<br />

molecular sieves, have the potential to be used in the separation of olefin and<br />

paraffin gases in the petrochemical industry. The conventional separation of<br />

olefin and paraffin gases is done using energy intensive low temperature<br />

distillation. Using atomistic models, average cavity sizes and cavity size (free<br />

volume) distributions of poly (pyrrolone-imide) copolymers are calculated using<br />

the Cavity Energetic Sizing Algorithm (CESA). Cavity size distributions of poly<br />

(pyrrolone-imide) copolymers are consistent with the wide angle x-ray diffraction<br />

measurements.

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