Unified isothermal and non-isothermal modelling of neat PEEK crystallization

Abstract : A differential generalized Avrami's law is used to model crystallization kinetic of PEEK in considering that PEEK crystallization results from the contribution of two distinct mechanisms. The form of this equation allows to predict with good accuracy both isothermal and non-isothermal crystallization kinetics. Nevertheless, isothermal model parameters are not entirely satisfactory for predicting non-isothermal crystallization and the identification of kinetic parameters is needed for both isothermal and non-isothermal cases. The results show that the Avrami exponents and Arrhenius activation energies remain constant for both conditions and therefore suggest that these parameters are only material dependent. On the other hand, the other kinetic parameters depend on the crystallization condition and vary with temperature and/or cooling rate.
Document type :
Journal articles
Complete list of metadatas

Cited literature [29 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01611997
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Friday, January 11, 2019 - 9:59:02 AM
Last modification on : Tuesday, October 22, 2019 - 5:20:44 PM
Long-term archiving on : Friday, April 12, 2019 - 1:13:04 PM

File

unified-isothermal-and-non-iso...
Files produced by the author(s)

Identifiers

Citation

Emeline Bessard, Olivier de Almeida, Gérard Bernhart. Unified isothermal and non-isothermal modelling of neat PEEK crystallization. Journal of Thermal Analysis and Calorimetry, Springer Verlag, 2014, 115 (2), p. 1669-1678. ⟨10.1007/s10973-013-3308-8⟩. ⟨hal-01611997⟩

Share

Metrics

Record views

123

Files downloads

107