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New Materials Permeable to Water Vapor pp 64–74Cite as

Microporosity by Evaporation of Volatile Products

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Abstract

If a polymer is dissolved in a volatile liquid and this liquid is removed by spraying, the polymer forms fine fibers which may be deposited on a releasing surface as a fine, microporous fiber fleece (see Sect. 9.1). In this case the molecular weight of the polymer should be rather low so that the polymer is able to dissolve in the volatile liquid. Another possibility of creating micropores is to mix a nonsolvent into the polymer solution in the volatile liquid. If this nonsolvent is also able to evaporate and has a lower volatility than the solvent, micropores are produced in a similar way to the coagulation process.

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9.1 Spraying of Plymer solutions

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  1. Dresdener straße 14, D-51373, Leverkusen, Germany

    Dr. Harro Träubel

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  1. Dr. Harro Träubel
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© 1999 Springer-Verlag Berlin Heidelberg

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Träubel, H. (1999). Microporosity by Evaporation of Volatile Products. In: New Materials Permeable to Water Vapor. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59978-1_9

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  • DOI: https://doi.org/10.1007/978-3-642-59978-1_9

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64206-7

  • Online ISBN: 978-3-642-59978-1

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