Combined effects of saturation pressure and gas desorption on foaming characteristics of microcellular plastics

Jung Hwan Seo, Won Suk Ohm, Soo Hyun Cho, Sung W. Cha

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The microcellular foaming process consists of the saturation process for dissolving gas molecules into plastic and the subsequent foaming process for cell formation. Foaming characteristics of microcellular plastics (MCPs) such as foaming ratio and cell morphology are largely determined by the saturation conditions, particularly by the saturation pressure. In this study, we investigate the effects of saturation pressure on the foaming characteristics of MCPs, when the quantity of dissolved gas (or the weight gain) is kept constant. Because the weight gain of a specimen is an increasing function of saturation pressure, different desorption times are used in order to maintain the same weight gain across specimens from different saturation pressures. Contrary to the common belief, for specimens with the same weight gain higher saturation pressures lead to lower foaming ratios. A hypothesis for the underlying mechanism and a practical ramification of the phenomenon are discussed.

Original languageEnglish
Pages (from-to)1399-1404
Number of pages6
JournalPolymer - Plastics Technology and Engineering
Volume50
Issue number14
DOIs
Publication statusPublished - 2011 Oct 1

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Desorption
Gases
Plastics
Molecules

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "The microcellular foaming process consists of the saturation process for dissolving gas molecules into plastic and the subsequent foaming process for cell formation. Foaming characteristics of microcellular plastics (MCPs) such as foaming ratio and cell morphology are largely determined by the saturation conditions, particularly by the saturation pressure. In this study, we investigate the effects of saturation pressure on the foaming characteristics of MCPs, when the quantity of dissolved gas (or the weight gain) is kept constant. Because the weight gain of a specimen is an increasing function of saturation pressure, different desorption times are used in order to maintain the same weight gain across specimens from different saturation pressures. Contrary to the common belief, for specimens with the same weight gain higher saturation pressures lead to lower foaming ratios. A hypothesis for the underlying mechanism and a practical ramification of the phenomenon are discussed.",
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Combined effects of saturation pressure and gas desorption on foaming characteristics of microcellular plastics. / Seo, Jung Hwan; Ohm, Won Suk; Cho, Soo Hyun; Cha, Sung W.

In: Polymer - Plastics Technology and Engineering, Vol. 50, No. 14, 01.10.2011, p. 1399-1404.

Research output: Contribution to journalArticle

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AU - Seo, Jung Hwan

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AU - Cha, Sung W.

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N2 - The microcellular foaming process consists of the saturation process for dissolving gas molecules into plastic and the subsequent foaming process for cell formation. Foaming characteristics of microcellular plastics (MCPs) such as foaming ratio and cell morphology are largely determined by the saturation conditions, particularly by the saturation pressure. In this study, we investigate the effects of saturation pressure on the foaming characteristics of MCPs, when the quantity of dissolved gas (or the weight gain) is kept constant. Because the weight gain of a specimen is an increasing function of saturation pressure, different desorption times are used in order to maintain the same weight gain across specimens from different saturation pressures. Contrary to the common belief, for specimens with the same weight gain higher saturation pressures lead to lower foaming ratios. A hypothesis for the underlying mechanism and a practical ramification of the phenomenon are discussed.

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