Table 3.
PER degradation rate constant k [1/s] in isothermal conditions of constant air humidity R = 0% and different temperature values, with parameters of linear Arrhenius relationship and thermodynamic parameters: activation energy Ea = -aR, enthalpy ∆H≠ = Ea –RT, entropy ∆S≠ = R(lnA-ln[kBT/h
| T | k ± Δk [1/s] | r | linear Arrhenius relationship f(1/T) = lnk |
Thermodynamic parameters |
|---|---|---|---|---|
| 333 K | (1.931 ± 0.217) 10-6 | -0.991 | a = -15363.55 ± 4835.54 |
Ea[kJ/mol]
127.73± 40.20 |
| 343 K | (1.569 ± 0.168) 10-5 | -0.992 | Sa = 1741.91 | |
| 348 K | (4.954 ± 0.555) 10-5 | -0.993 | b = 32.05 ± 13.35 |
Δ
H
≠
[kJ/mol]
125.26±42.68 |
| 353K | (9.537 ± 2.028) 10-5 | -0.982 | Sb = 4.80 | |
| 363 K | (2.601 ± 0.353) 10-4 | -0.990 | r = -0.981 |
Δ
S
≠
[J/mol
∙
K]
21.62±133.92 |