Dielectric Study of Pure Polymer and Mixed Monomer-Polymer Single Crystals of pTS Diacetylene: a Comparison with Neutron Scattering Results

• Authors: S. Longevile , J. Even , M. Bertault , H.A. Kołodziej , J. Sworakowski
• Languages of publication: EN

Abstracts

EN

Temperature and frequency dependences of the electric permittivity in mixed monomer-polymer single crystals of the diacetylene pTS (2,4-hexadiynylene bis(p-toluenesulphonate)) are reported. The dependences were determined in the temperature range 100-250 K, and in the frequency range 100 Hz - 1 MHz. Two types of single crystals were studied: nearly-fully polymerized ones, and those containing ca. 20% of polymer in the monomer matrix. The dynamics is characterized by a high-frequency response (v ≫ 3 GHz) which corresponds to the soft mode analysed previously by the Raman and neutron inelastic scatterings. At low frequencies (v ≤ 1 kHz), another component is observed, its dielectric intensity peaking around the transition temperature in the fully polymerized crystals. The results are consistent with the results obtained from NMR and neutron scattering experiments.

Keywords

EN

64.70.Kb; 61.12.-q; 77.84.Jd

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 88
• Issue: 2
• Pages: 359-367

Dates

published

1995-08

received

1995-04-25

Contributors

author

S. Longevile

• Groupe Matiere Condensée et Matériaux, URA au C.N.R.S. 804, Université de Rennes I, Campus de Beaulieu, 35042 Rennes Cedex, France

author

J. Even

• Groupe Matiere Condensée et Matériaux, URA au C.N.R.S. 804, Université de Rennes I, Campus de Beaulieu, 35042 Rennes Cedex, France

author

M. Bertault

• Groupe Matiere Condensée et Matériaux, URA au C.N.R.S. 804, Université de Rennes I, Campus de Beaulieu, 35042 Rennes Cedex, France

author

H.A. Kołodziej

• Institute of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland

author

J. Sworakowski

• Institute of Physical and Theoretical Chemistry, Technical University of Wrocław, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland