Microwave dielectric properties of poly(ethylene glycol adipate) with a binary filler

The conformations of macromolecules and the dielectric properties (in the m icrowave frequency region) of poly(ethylene glycol adipate) containing a bi nary filler composed of graphite and pyrogenic silica were studied. Both di electric constant epsilon' and loss factor epsilon " depend on the graphite concentration in the filler. The use of the binary filler increases epsilo n' and epsilon " as compared with bare graphite. The influence of the confo rmation of poly(ethylene glycol adipate) macromolecules on the properties o f the compositions is displayed in the undercritical region of the graphite amount in the binary filler.