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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Costa, Tania Isabel Lopes Da
Universidad Pablo de Olavide
in Cooperation with on an Cooperation-Score of 37%
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article
Visual and acoustic investigation of the critical behavior of mixtures of CO2 with a perfluorinated polyether
Abstract
<p>A simple acoustic method was used to investigate the critical behavior of mixtures of CO<sub>2</sub> + Krytox, a commercially available perfluoropolyether. A visual acoustic high-pressure cell recently developed was used. The cell was specially designed to include two piezoelectric transducers and two sapphire windows that make this cell well suited to investigate critical behavior of mixtures, using simultaneously the acoustic technique and the direct visual inspection of the critical opalescence. Measurements of the critical temperature T<sub>c</sub> and pressure p<sub>c</sub> of the binary mixture of xCO<sub>2</sub> + (1 - x)Krytox were performed restricted to the region richer in carbon dioxide, in the CO<sub>2</sub> mass fraction range 1-0.9636. Comparison of visual and acoustic data enabled the evaluation of the applicability of the acoustic technique to study the critical behavior of mixtures of CO<sub>2</sub> with low polydispersity polymeric material.</p>