Study on the Foaming Behavior of PS-CO2 by Using Water or Ethanol as Co-Blowing Agent

Yi Wei Luo; Chun Ling Xin; Jiao Sun; Bao Rui Yan; Ya Dong He

doi:10.4028/www.scientific.net/AMR.748.112

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 748Study on the Foaming Behavior of PS-CO2 by Using...

Study on the Foaming Behavior of PS-CO₂ by Using Water or Ethanol as Co-Blowing Agent

Abstract:

Carbon dioxide (CO₂) has been reported as an interesting substitute of banned ozone-depleting blowing agents, such as HCFC and HFC etc., for low-density polystyrene (PS) foam production, but it is difficult to industrialize due to its low solubility in PS matrix; therefore, high pressure is always needed in order to obtain the required gas concentrations for low density foam. Mixtures of blowing agents might be a practical way to make foam processing easy to control. In this paper, the foaming behaviors of PS-CO₂by using water or ethanol as co-blowing agent were investigated. The performances of foams obtained by PS-CO₂, PS-CO₂-water and PS-CO₂-ethanol systems were tested respectively. It was found that cell size increased owing to the existence of co-blowing agent; in particular, the expansion ratio of PS foam obtained by CO₂-ethanol was 1.3 times greater than that by CO₂. At the same time, cell density as well as apparent density decreased with temperature increasing, while cell size showed the opposite. Cell size and apparent density, rather than cell density, decreased with pressure. These results were explained by the solution behavior of each of blowing agent.

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Periodical:

Advanced Materials Research (Volume 748)

Pages:

112-116

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.748.112

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Online since:

August 2013

Authors:

Yi Wei Luo, Chun Ling Xin, Jiao Sun, Bao Rui Yan, Ya Dong He

Keywords:

Co-Blowing Agent, Microcellular Foaming, Performance, Sorption

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