Fig. 11 shows the dielectric loss tangent, tan, as a function of frequency for l-methyl-3-propyl imidazolium iodide, at different temperatures. In order to estimate T2 and 5 this tan plots can also be employed. [Pg.398]

Figure 8.13 Mechanical and dielectric loss tangent tan 8 and NMR absorption line width (maximum slope, in gauss) of polytrifluorochloroethylene (Kel-F) (41). |

The real (s ) and imaginary (s ) parts of the dielectric constant as well as the dielectric loss tangent (tan ) can be extracted from equation (20), [Pg.389]

Polymer Dieleetrie permittivity e, eonventional polymer Dielectric permittivity e, plasma polymer Dielectric loss tangent tan S, eonventional polymer Dielectric loss tangent tan S, plasma polymer [Pg.630]

As illustrated in Appendix 1 it can be proved that the relaxation time T2 corresponds to the frequency of the maximum in dielectric loss tangent (tan ). In this method the characteristic time constant T2 was chosen from the frequency at the maximum in tan( ). Hence, by using the relation T2 = T -JS equation (20) can be modified to [Pg.390]

The company s dielectric analyzer (DEA) measures capacitive and conductive properties over different frequencies, temperatures, and times to determine the permittivity e, loss factor e", dielectric loss tangent tan 8, and ionic conductivity. The DEA measures data at eight decades from 0.003 to 300,000 Hz [3]. Decades and octaves quantify frequency changes. [Pg.47]

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