Regensburg 2004 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 2: Polymer Surfaces II

CPP 2.6: Vortrag

Montag, 8. März 2004, 12:15–12:30, H 37

The mechanic of interphases in adhesive bonds as observed by Brillouin microscopy — •Ulrich Mueller1,2, Jan Kristian Krueger1,2, Ravindrakumar Bactavachalou1,2, Roland Sanctuary1,3, Wulff Possart1,4, and Wolfgang Manglkammer1,21Laboratoire Europeen de Recherche Universitaire Saarland-Lorraine (LERUSL) — 2Universititaet des Saarlandes, Geb. 38, D-66123 Saarbruecken — 3Centre Universitaire de Luxembourg, 162a av. de la Faiencerie, L-1511 Luxembourg — 4Universtitaet des Saarlandes, Geb. 22, D-66123 Saarbruecken

Today, it is increasingly common to use organic adhesives for the realization of mechanical joints between all kind of materials. For the understanding of the mechanical properties of such compounds it is of great interest to know the spatial variations of the elastic properties inside the adhesive bond. From other examples in polymer physics it is well known that elastic properties of polymers could become field quantities because of molecular texture e.g. induced by injection moulding, extrusion or transcrystallization on a solid surface. Our goal was to investigate the elastic properties within interphases between an adhesive and substrates (e.g. metals, silicon, etc.) using high spatial resolution as provided by the recently developed Brillouin microscopy. It turns out that the interphases as seen by their elastic properties strongly depend on the bond material, the substrates and preparation conditions. Additionally we found an astonishing width of the interphases with a magnitude of several hundred micrometers.

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