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|Author(s):||Adam J. Nolte; Jun Y. Chung; Christopher M. Stafford;|
|Title:||Harnessing Wrinkle Delamination Mechanics to Measure and Pattern Polymer Coatings|
|Published:||March 21, 2010|
|Abstract:||Compressive stresses in stiff polymer coatings can give rise to surface instabilities in which the coating adopts a sinusoidally wrinkled morphology with a dominant wavelength, d, as displayed in Figure 1a. Such instabilities are generally observed for polymer coatings that are well-adhered to compliant substrates. Compressively stressed coatings may also simply delaminate over a localized area these features, commonly called blisters, are formed in systems where the compliance of the substrate is high and/or coating-substrate adhesion is poor. Between these two extremes of behavior, one can observe wrinkling delamination , where a coating initially wrinkles but then forms blisters of width L that relax the wrinkling stability within an approximate width R. While both wrinkling instabilities and buckle delamination have been well-studied in the literature, wrinkling delamination has received very little attention. This talk will lay a theoretical foundation for wrinkling delamination and demonstrate how studying this phenomenon can lead to new approaches for measuring the adhesion strength of polymer coatings and patterning microscale features.|
|Conference:||American Chemical Society, Spring 2010 National Meeting & Exposition|
|Pages:||pp. 1 - 1|
|Location:||San Francisco, CA|
|Dates:||March 21-25, 2010|
|Keywords:||adhesion, polymer, coatings, wrinkling, delamination, mechanics, patterning|
|Research Areas:||Polymers, Characterization, Nanomaterials, Advanced Materials|
|PDF version:||Click here to retrieve PDF version of paper (111KB)|