Abstract
Polystyrene disks were saturated with nitrogen at 2000 psi pressure (13.8 Mpa) and foamed at 115 C in a pressurized cavity. It was found that the cavity pressure had no influence on the cell nucleation density. This was a surprising result, since based on classical nucleation models, we expected fewer and fewer cells to nucleate as we increased the cavity pressure.
Volume Subject Area:
Porous, Cellular and Microcellular Materials
Topics:
Bubbles,
External pressure,
Nitrogen,
Nucleation (Physics),
Cavities,
Pressure,
Density,
Disks
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