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  • 1 Centro de Química, Física Molecular, Complexo I, IST Av. Rovisco Pais 1096 Lisboa Codex Portugal
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The relaxation of electric field-induced polar orientation in a side-chain-bearing liquid-crystalline polysiloxane was measured by means of thermally stimulated depolarization currents. Different relaxation mechanisms were identified and characterized: the glass transition cooperative relaxation exhibits compensation behaviour. On the other hand, lowerTg and upperTg discharges were observed and their molecular nature is discussed.