TY  - JOUR
AU  - Gorokhov, G.
AU  - Bychanok, D.
AU  - Gayduchenko, I.
AU  - Rogov, Y.
AU  - Zhukova, E.
AU  - Zhukov, S.
AU  - Kadyrov, L.
AU  - Fedorov, G.
AU  - Ivanov, E.
AU  - Kotsilkova, R.
AU  - Macutkevic, J.
AU  - Kuzhir, P.
PY  - 2020
DA  - 2020//
TI  - THz spectroscopy as a versatile tool for filler distribution diagnostics in polymer nanocomposites
T2  - Polymers (Basel)
JO  - Polymers (Basel)
SP  - 3037 (1 to 14)
VL  - 12
IS  - 12
KW  - THz spectroscopy
KW  - nanocomposites
KW  - percolation threshold
KW  - time-domain spectroscopy
KW  - time-domain spectrometer
KW  - TDS
AB  - Polymer composites containing nanocarbon fillers are under intensive investigation worldwide due to their remarkable electromagnetic properties distinguished not only by components as such, but the distribution and interaction of the fillers inside the polymer matrix. The theory herein reveals that a particular effect connected with the homogeneity of a composite manifests itself in the terahertz range. Transmission time-domain terahertz spectroscopy was applied to the investigation of nanocomposites obtained by co-extrusion of PLA polymer with additions of graphene nanoplatelets and multi-walled carbon nanotubes. The THz peak of permittivity's imaginary part predicted by the applied model was experimentally shown for GNP-containing composites both below and above the percolation threshold. The physical nature of the peak was explained by the impact on filler particles excluded from the percolation network due to the peculiarities of filler distribution. Terahertz spectroscopy as a versatile instrument of filler distribution diagnostics is discussed.
SN  - 2073-4360
UR  - http://www.ncbi.nlm.nih.gov/pubmed/33353036
UR  - https://doi.org/10.3390/polym12123037
DO  - 10.3390/polym12123037
LA  - English
N1  - PMID:33353036; PMCID:PMC7767186
ID  - Gorokhov_etal2020
ER  -