[Study of the dielectric permeability in the superhigh frequency range of a degraded polyoxybutyrate biopolymer].
The dielectric permeability of the degradable biopolymer polyhydroxybutyrate synthesized by hydrogen-oxidizing bacteria Alcaligenes eutrophus was investigated by the resonance method using original highly sensitive microstrip sensors. For the first time, a linear growth of dielectric permeability (delta epsilon/delta T = 7 x 10(-4) degree-1) due to the flexibility of the polymer chain in the temperature range from 10 to 70 degrees C was revealed. The 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-molecular substances like liquid crystals was established. It was shown that at low values of dielectric permeability in the high-frequency range (epsilon' = 2.25 +/- 0.02), which are stable, in a wide range of frequencies of the electromagnetic field (1 MHz - 1 Hz), polyoxybutyrate can be used in the microwave equipment.
Beliaev
G A
GA
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russia.
Volova
T G
TG
Drokin
N A
NA
Shepov
V N
VN
D000421:Alcaligenes / Q000737:chemistry; D001704:Biopolymers / Q000737:chemistry*; D004553:Electric Conductivity; D006885:Hydroxybutyrates / Q000737:chemistry*; D011846:Radio Waves
D001704:Biopolymers; D006885:Hydroxybutyrates