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Molecular motions in a side-chain liquid-crystalline polymethacrylate. A thermally stimulated currents study of the dipolar relaxations in the vitreous and liquid-crystalline phases and at the glass transition

✍ Scribed by João F. Mano; Natália T. Correia; Joaquim J. Moura Ramos; David Coates

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
660 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

In the present work we report the results of a Thermally Stimulated Discharge Currents (TSDC) study of a side‐chain liquid‐crystalline polymer. The different discharges observed in the TSDC spectrum have been analysed by the thermal sampling technique and have been attributed to specific relaxation mechanisms at the molecular level. A particular feature of the polymer studied in this work is that the mesogenic side group presents both longitudinal and transverse components of the dipole moment, and this seems to be at the origin of the presence of two separated relaxations in the liquid‐crystalline phase.

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