Characterising Arrhenius moisture diffusivity constants using non-isothermal sorption

摘要: Abstract The diffusivity of moisture in a substance at an elevated temperature can be characterised using the technique thermogravimetric desorption. However, loss during initial ramp before stabilising test could impair very significantly accuracy evaluated diffusivity. This overcome by discarding data associated with period non-isothermal sorption followed translating residual constant duration, Δ t shift , to reference time, ref corresponding temperature, T ; regressing between experimental data, ( M ), and theoretical isothermal t,eq D )), yields diffusivity, . Extending time-translation time-shifting dynamic which is function Arrhenius constants o E d becoming two extracted ) )).