The capacitance of capacitors containing PVC dielectric dropped by a factor of 2 as the frequency was raised from 60 to lO'' Hz. With polyethylene dielectric there was no corresponding capacitance...

The capacitance of capacitors containing PVC dielectric dropped by a factor of 2 as the frequency was raised from 60 to lO'' Hz. With polyethylene dielectric there was no corresponding capacitance change. Account for the difference in behavior.