Research on the Tensile Properties of Microcellular PS with Supercritical CO₂

Abstract:

Separating the influence of relative density and cell diameter on the tensile properties is very important to the theory research on mechanic properties of microcellular foamed materials. In this article, differences of the influences of relative density and cell diameter on the tensile properties are identified by the foaming PS in constrained mold. The effects of relative density and foaming process conditions such as foaming temperature, foaming time and saturated pressure on the tensile strength and Youngs modulus are analyzed. The results show that relative density is the only structural variable of Youngs modulus and Youngs modulus is not relative to cell diameter. Youngs modulus is in proportion to relative density. Tensile stress of microcellular PS is in contrast to cell diameter, decreases with increasing foaming time and foaming temperature and increases with saturated pressure.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 395-402
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.395
• Online since: September 2013
• Authors: Xin Liao, Chang Chun Wang, Xiao Miao Cao
• Keywords: Microcellular PS, Process Conditions, Relative Density, Tensile Properties

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