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Dewetting of Glassy Polymer Films

Shenoy, Vijay and Sharma, Ashutosh (2002) Dewetting of Glassy Polymer Films. In: Physical Review Letters, 88 (23). 236101/1-4.


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Dynamics and morphology of hole growth in a film of power hardening viscoplastic solid [yield stress~(strain-rate)n] is investigated. At short times the growth is exponential and depends on the initial hole size. At long times, for n>1/3, the growth is again exponential but with a different exponent. However, for n<1/3 the hole growth slows and the hole radius approaches an asymptotic value at long times. The rim shape is highly asymmetric, the height of which has a power law dependence on the hole radius (exponent close to unity for 0.25<n<0.4). The above results explain recent intriguing experiments of Reiter [Phys. Rev. Lett., 87, 186 101 (2001)] on dewetting.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: American Physical Society
Additional Information: Copyright for this article belongs to American Physical Society (APS).
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 16 Nov 2004
Last Modified: 19 Sep 2010 04:17
URI: http://eprints.iisc.ac.in/id/eprint/2319

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