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The solubility of carbon dioxide (CO2) and dimethyl ether (DME) blends in polystyrene (PS) is studied as a function of the temperature and the pressure. The solubility was measured by means of the gravimetric method and a visualizing dilatometer which determined the swollen volume to compensate for the buoyancy change due to swelling. The solubility of the blend gases for the ternary PS/CO2/DME system...
This paper presents a generalized methodology to establish a thermodynamic model that describes a ternary mixture system, which includes a blend of two gases and a polymer melt. The model can be derived based on a phase equilibrium condition and an Equation of State (EOS). As a case study, a model for the ternary system that contains an HFC-134a/HFC-152a blend dissolved in a polystyrene (PS) melt...
The solubilities of carbon dioxide and nitrogen in a polylactide melt were determined at temperatures from 180 to 200°C and pressures up to 28MPa using a magnetic suspension balance (MSB). Both Sanchez–Lacombe (SL) and Simha–Somcynsky (SS) equations-of-state (EOS) were applied to predict the amount of volume swelling in the polylactide (PLA)/gas mixture due to gas dissolution. With the proper prediction...
Microfluidic droplet systems have shown great promise in high throughput chemical assays to minimize chemical consumption and increase process efficiency. We report a droplet system that forms nanovolume drops under static conditions. The programmability of drop sizes is determined by geometric configurations and surface tension, and not particularly sensitive to flow rates. The geometry of the device...
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