Thickness-dependent mechanical properties of polydimethylsiloxane membranes

    Authors

    M. Liu; J. R. Sun; Y. Sun; C. Bock;Q. F. Chen

    Comments

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    Abstract

    Polydimethylsiloxane (PDMS) has cross-linked network structures and its properties have been regarded as dimensionally independent. Here we demonstrate that both the mechanical strength and the Young's modulus of the PDMS membranes are thickness dependent and the transition from bulk behavior to dimension dependent is predicted to occur at a membrane thickness of about 200 mu m. The thickness-dependent phenomenon is attributed to shear stress during fabrication, which is proportional to the thickness-induced reorder of polymer chain coils to form stronger cross-linked networks.

    Journal Title

    Journal of Micromechanics and Microengineering

    Volume

    19

    Issue/Number

    3

    Publication Date

    1-1-2009

    Document Type

    Article

    WOS Identifier

    WOS:000263678200029

    ISSN

    0960-1317

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