Compressive behavior of microcellular polystyrene foams processed in supercritical carbon dioxide.: An article from: Polymer Engineering and Science

This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on December 1, 1998. The length of the article is 4117 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

From the author: Microcellular polystyrene foams have been prepared using supercritical carbon dioxide as the foaming agent. The cellular structures resulting from this process have been shown to have a significant effect on the corresponding mechanical properties of the foams. Compression tests were performed on highly expanded foams having oriented, anisotropic cells. For these materials an anisotropic foam model can be used to predict the effect of cell size and shape on the compressive yield stress. Beyond yield, the foams deformed heterogeneously under a constant stress. Microstructural investigations of the heterogeneous deformation indicate that the dominant mechanisms are progressive microcellular collapse followed by foam densification. The phenomenon is compared to the development of a stable neck commonly observed in polymers subjected to uniaxial tension, and a model that describes the densification process is formulated from simple energy balance considerations.

Citation Details
Title: Compressive behavior of microcellular polystyrene foams processed in supercritical carbon dioxide.
Author: Kelyn A. Arora
Publication:Polymer Engineering and Science (Refereed)
Date: December 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: 38 Issue: 12 Page: 2055(8)

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