Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: Polymer Physics I

CPP 2.6: Talk

Monday, March 26, 2007, 11:30–11:45, H40

Shear and elongational properties of melts of reactively compatibilized PA 6/ABS blends — Christian Sailer and •Ulrich Alexander Handge — Institute of Polymers, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich

Reactive compatibilization is a technologically commonly applied method in order to improve the interfacial adhesion in multiphase polymer blends. In this study, we investigated the influence of reactive compatibilization on the rheological properties and the morphology of polyamide 6/acrylonitrile-butadiene-styrene (PA 6/ABS) blends in the melt. Three different blends with different types of morphology (disperse morphology and cocontinuous structure) were prepared. Then linear viscoelastic shear, melt elongation and subsequent recovery experiments were performed. The linear viscoelastic shear properties of the blends were discussed using the fractional Zener model. In melt elongation, we investigated the deformation of the blend morphology using atomic force microscopy and quantified the stretch ratio of the extended drops and domains. The analysis of our recovery experiments after melt elongation revealed that the interfacial tension and reactive compatibilization strongly influence the elasticity of the blends (C. Sailer, U.A. Handge, submitted). We discuss our experimental results for the blends by taking into account the formation of polymer chains grafted with PA 6 via reactive compatibilization.