Tableau 3
Energies d’activation et facteurs pré-exponentiels des coefficients de solubilité (entre 5 et 100 °C) et de diffusion d’eau (entre 5 et 170 °C) dans le PEI et le PEEK avant vieillissement thermique.
Activation energies and pre-exponential factors of the coefficients of water solubility (between 5 and 100 °C) and diffusion (between 5 and 170 °C) in PEI and PEEK before thermal ageing.
| Matériau | Solubilité S | Diffusion D | ||
|---|---|---|---|---|
| ES (kJ.mol−1) | S0 (mol.L−1.Pa−1) | ED (kJ.mol−1) | D0 (m2.s−1) | |
| PEI | −44,2 | 7,1 × 10−12 | 33,9 | 9,9 × 10−7 |
| PEEK | −43,2 | 3,0 × 10−12 | 34,4 | 1,3 × 10−6 |
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