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Related Experiment Videos

Complete wetting from polymer mixtures.

U Steiner, J Klein, E Eiser

    Science (New York, N.Y.)
    |November 13, 1992
    PubMed
    Summary
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    Binary polymer mixtures exhibit complete wetting behavior at interfaces. One polymer phase forms a macroscopic wetting layer that grows logarithmically over time, suggesting their use in studying wetting phenomena.

    Area of Science:

    • Polymer science
    • Materials science
    • Physical chemistry

    Background:

    • Coexisting polymer phases have low interfacial energies below their critical solution temperature.
    • This property promotes the exclusion of one phase from interfaces favoring the other.

    Purpose of the Study:

    • To report and investigate complete wetting behavior in a binary mixture of statistical olefinic copolymers.
    • To explore the formation and growth of wetting layers at the polymer-air interface.

    Main Methods:

    • Utilizing a self-regulating geometry to control and measure interfacial phenomena.
    • Observing the growth dynamics of a wetting layer from a coexisting polymer phase.

    Main Results:

    • Complete wetting was observed at the polymer-air interface.

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  • The wetting layer of one phase attained macroscopic dimensions.
  • The thickness of the wetting layer increased logarithmically with time.

    • Conclusions:

    • Binary polymer mixtures demonstrate significant wetting phenomena.
    • These systems serve as valuable models for studying interfacial behavior and wetting.
    • The observed macroscopic wetting layer growth has implications for materials design and understanding phase behavior.