Complex permittivity of organic solvents at microwave frequencies

The complex electrical permittivity of industrially produced organic solvents of several classes with different abilities to form hydrogen bonds, such as ketones (acetone, 2-butanone), alcohols (ethyl alcohol, isopropyl alcohol), acetic esters (ethyl acetate, propyl acetate, butyl acetate), hydrocar...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-05, Vol.862 (6), p.62085
Main Authors: Zarubina, A Yu, Kibets, S G, Politiko, A A, Semenenko, V N, Baskov, K M, Chistyaev, V A
Format: Article
Language:English
Subjects:
Acetic acid
Acetone
Bonding strength
Carbon tetrachloride
Chlorine
Complex permittivity
Dielectric loss
Dielectric strength
Dispersion
Esters
Ethanol
Ethyl acetate
Frequency ranges
Heptanes
Hydrocarbons
Hydrogen bonds
Isopropanol
Ketones
Microwave frequencies
Permittivity
Solvents
Toluene
Xylene
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Summary:The complex electrical permittivity of industrially produced organic solvents of several classes with different abilities to form hydrogen bonds, such as ketones (acetone, 2-butanone), alcohols (ethyl alcohol, isopropyl alcohol), acetic esters (ethyl acetate, propyl acetate, butyl acetate), hydrocarbon solvents (toluene, ortho-xylene, heptane, solvent Nefras), chlorine-containing solvents (carbon tetrachloride, tetrachlorethylene), as well as a mixed solvent based on acetone, butyl acetate and ortho-xylene of brand R-5A, were studied. The frequency dependences of permittivity were measured by the coaxial probe method in a wide frequency range from 200 MHz to 20 GHz. It is shown that the chemical nature of solvents has a significant effect on their permittivity. It was found that solvents with weak hydrogen bonds (hydrocarbons and chlorine-containing solvents) have low values of the permittivity (not higher than 2.6) and negligible dielectric losses. Solvents with moderately strong bonds (acetic acid esters and ketones) have high values of permittivity with pronounced frequency dispersion, noticeable dielectric losses and Debye relaxation frequency above 20 GHz. Strong hydrogen bonded solvents (alcohols) are characterized by high values of the permittivity with significant frequency dispersion and Debye relaxation frequency below 1.5 GHz.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/862/6/062085