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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster Session II

CPP 32.12: Poster

Donnerstag, 20. März 2025, 09:30–12:00, P3

In-Situ Neutron and Raman spectroscopy on polymer thin films at varying humidity — •Marcell Wolf¹, Lucas Kreuzer¹, Friederike Ganster², Christopher Garvey¹, and Peter Müller-Buschbaum² — ¹Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany — ²Lehrstuhl für Funktionelle Materialien, Physik Department, Technische Universität München, James-Frank-Straße 1, 85748 Garching, Germany

Here we present a new sample environment for in-situ neutron and Raman spectroscopy on polymer thin films at varying humidities and temperatures. The combination of in-situ Raman and neutron spectroscopy shows the advantage that no difference within the sample composition, temperatures and humidity variations at the sample can be neglected, compared to separated single measurements. The structural changes can be directly related to the dynamic changes while varying the environment. We plan to describe our setup and present the first results of this new sample environment measured at the neutron time-of-flight spectrometer FOCUS at the PSI, Switzerland. For our knowledge this is the first time, that both spectroscopy techniques in comibination with varying humidity are applied at in-situ measurements. The new sample environment will be available to all users at time-of-flight spectrometer TOFTOF at the MLZ, as soon as the reactor restarts. Different variations of the sample cell, especially designed for different neutron experiments are available at other neutron instruments at the MLZ.

Keywords: Neutron spectroscopy; Raman spectroscopy; Polymer films; Humidity