Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster: Nanoparticles and Composite Materials

CPP 8.13: Poster

Montag, 26. März 2012, 17:30–20:00, Poster A

Polymers in an aligned CNT array — •Marina Khaneft¹, Markus Domschke¹, Bernd Stühn¹, Rudolf Feile¹, Jörg Engstler², and Jörg Schneider² — ¹Experimentelle physik kondensierter materie TU Darmstadt — ²Eduard Zintl-Institute für Anorganische und Physikalische Chemie TU Darmstadt

An aligned system of carbon nanotubes (CNTs) is obtained by noncatalytic chemical vapor deposition using templates of porous alumina (PAOX) with hexagonally ordered pores and removal of the alumina template. The 3D aligned CNTs array is mechanically stable, flexible and consists of freestanding, parallel aligned CNTs fixed by a carbon layer on one side. Obtained CNTs were used for preparation of CNT/polymer composites by melt infiltration of polystyrene (PS) into the free interstices of CNTs structure. Here we present an experimental study of polymer in aligned CNT array. Investigation is focused on the structure of the composites, polymer behaviour near the nanotubes. For quantitative analysis of the structure of the composites and control of the filling process small angle X-ray scattering was used. We applied differential scanning calorimetry to analyse a glass transition of the polymer inside the CNT array depending on the tube diameter and molecular weight of the polymer. Additionally, we applied Brillouin scattering and compare the sound propagation in different CNT/PS composites (vary diameter and molecular weight) with other nanoporous materials filled by polymer. The variation of the Brillouin spectra with the orientation of sample and scattering vector will be discussed.