Regensburg 2002 – wissenschaftliches Programm
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SYME: Mechanical Properties of Thin Films
SYME 1: Elastic Properties
SYME 1.2: Vortrag
Montag, 11. März 2002, 16:00–16:15, H 31
Mechanical Spectroscopy of Thin PPV Films — •Attila Nagy1, Alexander Strahl1, Hartmut Neuhäuser1, and Sigurd Schrader2 — 1Institut für Metallphysik und Nukleare Festkörperphysik, Technische Universität Braunschweig — 2Institut für Physik, Lehrstuhl Physik Kondensierter Materie, Universität Potsdam
Thin layer of PPV (poly-p-phenylenevinylene) have been by means of spin-coating deposited on Si substrate cantilevers. In a vibrating reed apparatus (electrostatical excitation and otical detection) the temperature dependence of vibration frequency and internal friction of the composite have been measured in order to study the elastic modulus and relaxation phenomena of the polymer layer during temperature cycling programs between 90 K and 570 K. Particularly, evaluating the temperature and frequency dependence, the typical relaxations before and after polymerisation have been examined. In addition irreversible processes in the film are observed during polymerisation. The results are compared with data from DSC and DTA measurements. This work was supported by the Graduiertenkolleg No-dqMetrologie in Physik und TechnikNo-dq of the TU Braunschweig and the PTB Braunschweig through the DFG.