Molecular Dynamics of Dipole Functionalized Triphenylene-based Discotics
- In this study, the molecular dynamics of a series of dipole functionalized triphenylene-based discotics, forming a columnar mesophase, were investigated by broadband dielectric spectroscopy (BDS). In addition to conductivity and localized dynamics, glassy dynamics were also observed. At higher temperatures an α1-processes and at low temperatures an α2 processes were detected having a completely different temperature dependence of its relaxation times. Different molecular assignments of α1- and α2-processes are suggested. The phase behavior of the material was explored under helium purge down to 100 K by differential scanning calorimetry (DSC). Besides the phase transition temperatures and enthalpies, one or two thermal glass transitions were found for all the materials. Moreover, the glassy dynamics were further investigated by Flash DSC, which is a chip-based calorimetry technique allowing for fast heating and cooling rates as high as 10000K/s.
Autor*innen: | Arda Yildirim |
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Weitere Person: | A. Bühlmeyer, S. Hayashi, J. C. Haenle, K. Sentker, P. Huber, S. Laschat, Andreas SchönhalsORCiD |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2019 |
Organisationseinheit der BAM: | 6 Materialchemie |
6 Materialchemie / 6.6 Physik und chemische Analytik der Polymere | |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Liquid Crystals |
Themenfelder/Aktivitätsfelder der BAM: | Material |
Veranstaltung: | Spring Meeting of German Physical Society |
Veranstaltungsort: | Regensburg, Germany |
Beginndatum der Veranstaltung: | 01.04.2019 |
Enddatum der Veranstaltung: | 05.04.2019 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 17.04.2019 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |