Kinetic Analysis and Characterization of Epoxy Resins ... - FedOA
Kinetic Analysis and Characterization of Epoxy Resins ... - FedOA
Kinetic Analysis and Characterization of Epoxy Resins ... - FedOA
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Introduction 52<br />
δ, between the dipole displacement <strong>and</strong> the electric field result in dielectric losses.<br />
The in-phase component <strong>of</strong> the dipole displacement with the electric field is power<br />
absorbed by the dielectric material as heat. In alternating current electrical circuits,<br />
the current is out <strong>of</strong> phase with the voltage.<br />
The complex power is the<br />
product <strong>of</strong> the complex current <strong>and</strong> voltage [14]:<br />
S= ⃗ V ∗ ⃗ I<br />
∗<br />
(1.22)<br />
where S is the complex power. If the preceding equation is rewritten in terms <strong>of</strong><br />
the complex capacitance, as defined earlier, the following equation results:<br />
S=jω C ∗ ⃗ V ⃗ V<br />
∗<br />
(1.23)<br />
where the real portion is the power dissipated in the electrical circuit.<br />
This is<br />
analogous to the Poynting power theorem in dielectrics.<br />
52