Investigation the dielectric permeability of the degradable biopolymer polyhydroxybutyrate in the super-high frequency range

The dielectric permeability of the degradable biopolymer polyhydroxybutyrat e synthesized by hydrogen-oxidizing bacteria Alcaligenes eutrophus was inve stigated by the resonance method using original highly sensitive microstrip sensors. For the first time, a linear growth of dielectric permeability (d elta epsilon/deltaT = 7.10(-4) degree(-1)) due to the flexibility of the po lymer chain in the temperature range from 10 to 70 degreesC was revealed. T he energy of a bend of the nearest fragments was evaluated (E = 392 K), and its correspondence to the energies of bends of the alcyl groups of low-mol ecular substances like liquid crystals was established. It was shown that a t low values of dielectric permeability in the high-frequency range (epsilo n' = 2.25 +/- 0.02),which are stable, in a wide range of frequencies of the electromagnetic field (1 MHz - 1 Hz), polyoxybutyrate call be used ill the microwave equipment.