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Dielectric spectroscopy of nanocomposites based on iPP and a PS treated in the water solutions of alkali metal salts
Author(s) -
Petronijevic Ivan M.,
Cerovic Dragana D.,
Dudic Dusko A.,
Dojcilovic Jablan R.,
Dojcinovic Biljana P.,
Pergal Marija V.
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4289
Subject(s) - materials science , alkali metal , dielectric , polystyrene , analytical chemistry (journal) , polymer , nanocomposite , polypropylene , polymer nanocomposite , inductively coupled plasma , composite material , chemistry , chromatography , organic chemistry , plasma , physics , optoelectronics , quantum mechanics
In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10 −9 mol/cm 3 to 1.25·10 −7 mol/cm 3 . The qualitative analysis of potassium distribution in the polymer matrix was conducted by time‐of‐flight secondary ion mass spectrometry cross‐sectional record. The relative dielectric constant ( ε ′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε ′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.