Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.71: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Work of Adhesion between Metals and Polymers on a Macro- and Microscopic Scale — •Marieke Füllbrandt, Dikran Kesal, and Regine von Klitzing — Stranski-Laboratorium für Physikalische und Theoretische Chemie,Technische Universität Berlin, Strasse des 17. Juni 124, 10623 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. A fundamental understanding about the adhesion mechanisms at the polymer/metal interface is inevitable.

In this contribution the work of adhesion between different metal/polymer systems relevant for industrial applications is studied by atomic force microscopy (AFM) and contact angle (CA) measurements. AFM is used for the determination of the pull-off force between a metal substrate and a polymeric microsphere. Measurements are conducted in a dry nitrogen atmosphere at 30 °C. The measured adhesion forces are analyzed using theoretical models of contact mechanics. Different models are discussed and the effect of roughness is considered. With CA measurements the surface energy of the solids is determined. From that the interfacial energy between a given metal/polymer system can be determined and further be related to the work of adhesion. Results from AFM and CA measurements are compared and possible adhesion phenomena are discussed.