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Dielectric properties of solution grown cellulose acetate thin films

1991; Elsevier BV; Volume: 11; Issue: 3-4 Linguagem: Inglês

10.1016/0167-577x(91)90100-k

1873-4979

A. K. Sharma, Ch. Ramu,

Dielectric materials and actuators

The dielectric capacitance and loss behaviour of solution grown cellulose acetate thin films were studied as a function of temperature (range 300–420 K) in the frequency range 50 Hz–15 kHz. The capacitance versus temperature plots show a single peak around 345 K which shifts towards higher temperatures with increasing frequency. The loss behaviour exhibits two peaks, occurring at 312 and 345 K. The low-temperature peak is interpreted in terms of small-scale movements of the dipole groups while the high-temperature peak is attributed to the dipole-segmental loss.