Berlin 2015 – scientific programme
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BP: Fachverband Biologische Physik
BP 11: Nanoparticles and Composite Materials II (joint CPP/BP)
BP 11.4: Talk
Monday, March 16, 2015, 15:45–16:00, C 243
Polymer/metal hybrids: Adhesion behaviour and polymer dynamics before and after corrosion treatment — •Marieke Füllbrandt1,2, Andreas Schönhals2, and Regine von Klitzing1 — 1Technische Universitaet Berlin, Str. des 17. Juni 124, 10623 Berlin — 2BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, 12205 Berlin
Polymer/metal hybrids are of high interest for example in lightweight constructions used in the automotive industry. They combine a high functional integration with a lower weight compared to pure metal parts. The joining of these dissimilar materials without using additional material is a central challenge. In a first step, the metal/polymer interface is characterized with regard to the adhesion behaviour on a macro- and microscopic length scale using contact angle (CA) measurements and colloidal probe atomic force microscopy. The latter method determines the adhesion force and energy which can be analysed and related to a work of adhesion per area. The effect of a (sub)micrometre scale roughness is considered using the Rabinovich approach. With CA measurements the surface energy of the solids is determined using the Owens-Wendt-Rabel-Kaelble method and further be related to the corresponding work of adhesion per area. In a second step, the influence of a corrosion treatment on the adhesion behaviour is investigated. Complementary, broadband dielectric spectroscopy measurements in a wide frequency (0.01 Hz to 1 MHz) and temperature range (-120 to 180 °C) are performed in order to characterize the polymer dynamics in bulk and at the metal interface before and after treatment.