October 26, 1959
Graph of the dielectric loss index vs. frequency for polyclorotrifluorothyleme
at room temperature and selected temperatures from -50 degrees to
200 degrees C.
The degree of crystallinity in these specimens measured at the National
Bureau of Standards was 80 percent.
For each temperature value, there is a frequency at which the loss
factor reaches a peak.
As this frequency increases with temperature, the height of the peak
Original Caption by Science Service
©National Bureau of Standards