The compressional relaxation performance of poly(tetrafluoro ethylene) (PTFE) in the a-transition region has previously been analysed and systematized using a two-component (TC) model. To further validate the consistency of the model and of the properties of its parameters, tand is calculated for extended ranges of temperature (from ¹ 50 to 250°C) and frequency (from 10 ¹6 to 10 8 Hz) and compared to dynamic mechanical as well as dielectric data. Modifying the original temperature dependence of one of the parameters of the model, namely of the characteristic relaxation time, leads to good qualitative and quantitative agreement between experiments and predictions for the whole experimentally accessed frequency ( ⬇ 1 to 10 7 Hz) and temperature range (120–200°C) of the a-transition.
Посилання на статтю:
Polymer Communication Modeling the dynamic performance of poly(tetrafluoro ethylene) in the a-transition region / F.-J. Wortmann // Polymer. – 1999. – N 40. – P. 1611–1615.