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Dielectric relaxations and ferroelectric behaviour of even–odd polyamide PA 6,9

Capsal, Jean-Fabien and Dantras, Eric and Dandurand, Jany and Lacabanne, Colette Dielectric relaxations and ferroelectric behaviour of even–odd polyamide PA 6,9. (2010) Polymer, vol. 51 (n° 20). pp. 4606-4610. ISSN 0032-3861

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Official URL: http://dx.doi.org/10.1016/j.polymer.2010.07.040

Abstract

Thermo Stimulated Current (TSC) combined with Dynamic Dielectric Spectroscopy (DDS) have been applied to the investigation of dielectric relaxation modes of an even–odd Polyamide PA 6,9. The correlation between results obtained by both methods allows us to describe precisely the molecular mobility. At high temperature, the various dielectric relaxation phenomena are separated by applying the dielectric modulus formalism. The comparison between the activation enthalpy values obtained by DDS and TSC leads to the assignment of the so-called α mode to cooperative movements of polymeric sequences. Molecular mobility of PA 6,9 is compared with the one of PA 11. The piezoelectric activity of PA 6,9 is shown and analyzed.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Polymer website: http://www.sciencedirect.com/science/journal/00323861
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Leila Abdelouhab
Deposited On:05 May 2011 13:53

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