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Equilibrium Data of the Biphasic System Poly(ethylene oxide) 4000 + Copper Sulfate + Water at (5, 10, 35, and 45) °C

2008; American Chemical Society; Volume: 53; Issue: 7 Linguagem: Inglês

10.1021/je800111j

ISSN

1520-5134

Autores

Rosana Moura de Oliveira, Jane Sélia dos Reis Coimbra, Kelly R. Francisco, Luís Antônio Minim, Luís Henrique Mendes da Silva, Edwin Elard Garcia‐Rojas,

Tópico(s)

Spectroscopy and Quantum Chemical Studies

Resumo

Phase equilibrium data of an aqueous two-phase system composed of poly(ethylene oxide) 4000 + copper sulfate + water were determined at four temperatures, (5, 10, 35, and 45) °C. The phase separation was entropically driven as can be seen by the small influence of temperature on the phase diagram. However, the rise in temperature increased both the tie line length and the slope of the tie line.

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