Abstract
The low-frequency elastic and dielectric properties of composite materials prepared by embedding of vinylidene fluoride–tetrafluoroethylene (V DF88/Te12) and vinylidene fluoride–trifluoroethylene (V DF60/Tr40) polar copolymers in porous glass matrices with a mean pore diameter of around 320 nm were investigated in the temperature range 150–330 K. Maxima of internal friction have been found near the glass transition temperatures Tg1 and Tg2 of the polymer amorphous fraction. Strong dielectric relaxation with characteristic time corresponding to the Williams–Landel–Ferry law was observed in the vicinity of temperature Tg1. An increase (≈10 K) of Tg1 temperature of the amorphous fraction of incorporated polymeric materials was detected. It was found that the low-frequency dielectric and mechanical losses in the vicinity of Tg1 are due to the same mechanism.
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