Dewetting of Glassy Polymer Films

Details Dewetting of Glassy Polymer Films Dewetting of Glassy Polymer Films

2002-02-11

arxiv.org/abs/cond-mat/0202160v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, RevTex

Scientific paper

10.1103/PhysRevLett.88.236101

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 exponential with a different exponent. However, for n < 1/3, the hole growth slows; the hole radius approaches an asymptotic value as time tends to infinity. 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, 186101 (2001).

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