Dynamic electrical analysis
Characterization of polymers by thermal analysis

Electrical Dynamic Analysis (EDA) is the most widely used technique for characterizing the dielectric properties of polymers. It is the electrical equivalent of ADM.

An alternating electric field is applied to the sample; measured current variations enable polarization variations to be determined, and hence the real ε′ and imaginary ε² components of the complex dielectric permittivity , as well as the loss factorδ = ε² / ε′. Accessible frequency ranges are much wider than for ADM: 10 ^-5 to 10⁹ Hz for some devices [31]. Such frequency ranges are covered by complementary measurement techniques:

• conversion of a signal recorded in the time domain (transient...