The dependence on temperature was expressed by the shift factor [a.sub.T] through the
Arrhenius equation. For all compounds, a viscosity law at 70[degrees]C was obtained, whose dependence on filler content was expressed by the factor [a.sub.[phi]] through the Krieger-Dougherty law.
The temperature dependence based on the
Arrhenius equation (Eq.
As stated above, life estimation testing as used by CET is based on the
Arrhenius equation which describes a first order reaction, such as a chemical reaction.
The simplified form of the
Arrhenius equation (ref.
This indicates the applicability of the
Arrhenius equation to annealing PLA.
Once the activation energy is known, equivalent cure times for a time-temperature profile can be accurately calculated using the
Arrhenius equation 9.
sup.-1]) sup.-1]) sup.-1]) 4a 3.43 50.5 164 279 4b 3.19 45.9 171 239 4c 3.01 45.1 116 210 The activation energy for [gamma] and [beta] relaxation processes was calculated by applying the
Arrhenius equation:
An alternative approach is to assume that the temperature dependence can be represented by an
Arrhenius equation from which an activation energy can be calculated, t = A exp (E/RT) where A is a constant, E is the activation energy, R is the gas constant, and T is the cure temperature in degrees kelvin.
where [gamma] is the rate of strain tensor, [eta] is the viscosity of the polymer melt, which may be written with the modified Cross model and the
Arrhenius equation, respectively, as below
It is fairly accepted that this superposition manifests itself from the molecular behavior and therefore, equations based on the activation energy (E), such as the
Arrhenius equation have been proposed.
Using this plastometer, the yield stress of EMC was directly measured at the actual molding temperature and its temperature dependency was clarified and characterized using the
Arrhenius equation. And also, the low shear viscosities below 10 [s.sup.-1] were obtained.
Although
Arrhenius equation could have been used in construction of the master curves, WLF equation have been taken in the present study.