Title :
Dielectric properties of cyanoethylcellulose
Author :
D. H. Hogle;M. M. Rutter;T. W. Dakin
Author_Institution :
Westinghouse Research Laboratories, Pittsburgh, Pa.
Abstract :
Previously reported measurements on the high dielectric constant polymer, cyanoethylcellulose, (C. W. Lewis and D. H. Hogle, J. Polymer Science 21, 411 (1956).) have been extended to a wide temperature range with material of three different degrees of substitution. Dielectric data from -76°C to 150°C over a frequency range from 25 cycles to 45 megacycles has been obtained from mono-(6.5% N), di-((10.4%) N), and “tri”-(12.6% N) cyanoethylated cellulose. The dielectric constant and dissipation factor variation with frequency is illustrated in Figures 1 and 2 for two temperatures. Dissipation factor data for cellulose (cellophane), by Stoops, (J. Am. Chem. Soc. 56, 1480 (1934).) as plotted in Figure 2 illustrates a relaxation time for the OH dipole in cellulose of the same order of magnitude as for the cyanodipole in the cyanoethylated compound.
Keywords :
"Temperature measurement","Dielectric constant","Polymers","Dielectric measurement","Temperature distribution"
Conference_Titel :
Electrical Insulation, 1957. annualReport 1957. Conference on
Print_ISBN :
978-1-5090-3134-4
DOI :
10.1109/EIC.1957.7507289