Regensburg 2016 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 53: Postersession DS/HL
DS 53.17: Poster
Donnerstag, 10. März 2016, 16:00–19:00, Poster A
Preparation-dependent viscoelastic properties of ultra-thin glass-forming polymer films. — •Pierre Chapuis1,2, Anne Rubin2, Freddy Anstotz3, Paul Montgomery3, and Günter Reiter1 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Germany — 2Institut Charles Sadron, Strasbourg, France — 3ICube/IPP, Strasbourg, France
Properties of ultra-thin glassy polymers films differ from bulk behavior. Many studies stated that it is a consequence of confinement and/or interfacial physics. Another possible explanation is suggested: the preparation process of the film by spin-coating entails an out-of-equilibrium state of the chains [1].
To give insight on this phenomenon we explore the influence of the preparation process of ultra-thin glassy freestanding polymer films on their viscoelastic response. Ultra-thin polymer films are obtained by spin-coating technique and transferred onto a silicone substrate containing an array of 5 μm. Using the nanobubble inflation method [2], a static pressure was applied and the resulting deformation was probed with time by 4D interferometric microscopy which is a non-contact method (3D + real time) developed at ICube.
We discuss the results of creep compliance measurements on poly(vinyl acetate) (PVAc) films of thicknesses below 100 nm for different molecular weights.
[1] M.Chowdhury et al., PRL 109, 136102 (2012) [2] P.A. O Connell et al., Science 18, 1750 (2005).