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Thermodynamic activity of some aqueous-organic solutions

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It has been found that the concentration dependences of the thermodynamic activity of water in aqueous-dimethylacetamide and aqueous-dimethylformamide solutions have breaks in the concentration regions of organic component of 40, 60, and 85% by wt.

A comparison of the data obtained with the structure of two types of fibres for which the investigated solutions are used as precipitants indicates a parallel course for the radical changes in structure of mixed solvents of definite compositions and of fibres which are obtained under precipitation conditions.

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Literature cited

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    I. Holten-Andersen and K. Eng, Progr. Org. Coat.,16, No. 1, 77 (1988).

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    M. M. Iovleva, L. Ya. Konovalova, et al., Khim. Volokna, No. 6, 42 (1988).

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    H. Michalski, S. Michalowski, M. Serwinski, and C. Strumillo, Zesz. Nauk Pt., Chemia,12, 73 (1962).

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    V. Gröbe and G. Mann, Faserf. und Textilt.,19, No. 12, 49 (1968).

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    L. D. Rudneva, Candidate's Dissertation, VNIISV, Kalinin (1978).

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Translated from Khimicheskie Volokna, No. 2, pp. 16–17, March–April, 1990.

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Iovleva, M.M., Konovalova, L.Y. Thermodynamic activity of some aqueous-organic solutions. Fibre Chem 22, 73–75 (1990).

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  • Polymer
  • Precipitation
  • Concentration Dependence
  • Organic Component
  • Radical Change