Dielectric properties of segmented polytetramethyleneoxide-based polyurethanes
Article first published online: 9 MAR 2003
Copyright © 1989 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 38, Issue 10, pages 1929–1940, 20 November 1989
How to Cite
Petrović, Z. S., Koco, F., Horvath, L. and Dulić, N. (1989), Dielectric properties of segmented polytetramethyleneoxide-based polyurethanes. J. Appl. Polym. Sci., 38: 1929–1940. doi: 10.1002/app.1989.070381014
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 10 APR 1989
- Manuscript Received: 15 MAR 1989
Three series of segmented polyurethanes, based on polytetramethylene oxide (PTMO) soft segments, having molecular weights of 650, 1000, and 2000 and MDI/butane diol hard segments, were synthesized and their dielectric properties examined. The effect of the soft segment length, soft segment concentration (ssc) as structural variables, and frequency and temperature as experimental variables, on relative permittivity and tan δ, were examined. The results were discussed in terms of the structural parameters such as the degree of phase separation and soft segment phase state. It was found that both soft segment length and ssc strongly affect dielectric behavior.