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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.39: Poster
Wednesday, April 2, 2014, 15:00–19:00, P3
Structure of adhesive-adherent interfaces probed by neutron scattering — •Markus Schindler1, Stephan Pröller1, Thomas Geue2, Jean-Francois Moulin3, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str.1, 85748 Garching — 2Laboratory for Neutron Scattering, ETHZ & PSI, 5232 Villigen, Switzerland — 3Helmholtz Zentrum Geesthacht, MLZ, Lichtenbergstr. 1, 85747 Garching
Pressure sensitive adhesives (PSAs) are widely used in everyday applications, industries and medicine. Individually tailored compounds exist for many fields of application. The interactions between an adherent and the polymer adhesive can lead to the establishment of an enrichment layer of one of the PSA's components close the interface. To investigate these buried interfaces neutron scattering is the technique of choice due to its high penetration, e.g. compared with X-rays. We present results from neutron scattering experiments, both TOF-GISANS and neutron reflectivity, revealing the inner structure of the surface-near regions and buried interfaces of a model PSA in contact with an adherent. This model PSA is the statistical copolymer P(EHA-stat-MMA), the adherent of choice is silicon, pre-treated with different cleaning routines. We find very different near-interface enrichment layers for the different buried interfaces.