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  • 1 Universidade do Minho Departamento de Engenharia de Polímeros Campus de Azurém 4800-058 Guimarães Portugal Campus de Azurém 4800-058 Guimarães Portugal
  • 2 Universidade do Minho Departamento de Física Campus de Gualtar 4710 Braga Codex Portugal Campus de Gualtar 4710 Braga Codex Portugal
  • 3 Universidade Nova de Lisboa Departamento de Química, Centro de Química Fina e Biotecnologia, Faculdade de Cięncias e Tecnologia 2825-114 Monte de Caparica Portugal 2825-114 Monte de Caparica Portugal
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Abstract  

Dielectric experiments are often performed in non-isothermal conditions. Thus, there is a difference between the temperature of the sample and the sensor temperature. In this work we propose and compare three temperature calibration methods based on the detection of transitions or relaxations: i) the melting of high-purity metallic standards (indium and tin), ii) the 2nd order phase transition of a ferroelectric crystal (TGS); iii) the -relaxation of an amorphous polymer (poly(carbonate)). The results obtained from the three different methods were used to construct a calibration curve for a given heating rate.