FORMATION OF COMBINED SURFACE FEATURES OF PROTRUSION ARRAY AND WRINKLES ATOP SHAPE-MEMORY POLYMER

L. Sun, Y. Zhao, W. M. Huang () and T. H. Tong
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L. Sun: School of Civil Engineering, Shenyang Jianzhu University, Shenyang, P. R. China
Y. Zhao: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore
W. M. Huang: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore
T. H. Tong: Cornerstone Research Group, Incorporated, 2750 Indian Ripple Road, Dayton, USA

Surface Review and Letters (SRL), 2009, vol. 16, issue 06, 929-933

Abstract: We demonstrate a simple and cost-effective approach to realize two combined surface features of different scales together, namely submillimeter-sized protrusion array and microwrinkles, atop a polystyrene shape-memory polymer. Two different types of protrusions, namely flat-top protrusion and crown-shaped protrusion, were studied. The array of protrusions was produced by the Indentation-Polishing-Heating (IPH) process. Compactly packed steel balls were used for making array of indents. A thin gold layer was sputter deposited atop the polymer surface right after polishing. After heating for shape recovery, array of protrusions with wrinkles on the top due to the buckling of gold layer was produced.

Keywords: Buckling; protrusion; shape-memory polymer; shape recovery; wrinkles (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09013505

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