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Solubilities of Blowing Agent Blends

Guangming Li, S. N. Leung, J. Wang, and C. B. Park. Department of Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada

The solubility of HFC 134a and HFC 152a in polystyrene melt was measured up to 800 psi at 150 oC and 190 oC. A magnetic suspension balance was used to experimentally measure the apparent solubility. The Simha-Somcynsky (SS) equation of state (EOS) was applied in the multi-components system to estimate the swollen volume. Consequently, the buoyancy compensation can be obtain to determine the solubility of the blowing agent blends in the polymer melt.