Abstract
The influence of polymer matrix of polymethyl methacrylate (PMMA) on the specific conductivity, percolation threshold, energy of activation of charge transport in polymer composites PMMA − polyaniline (PAN) was studied.
 Concentration dependence of the electrical conductivity of composites reveals percolation behavior with the low value of percolation threshold within 2 % content of polyaniline. It is found that in the polymer composites PMMA - PAN the specific conductivity increases by more than 8−9 orders of magnitude compared to the original matrix.
 On the base of temperature dependence of the specific conductivity of the obtained composites, it is concluded that PMMA polymer matrix does not change the semiconductor nature of PAN conductivity in the composite but effects on the activation parameters of the charge transport.
 From ESR spectra, it found that the presence of a polymeric matrix causes significant delocalization of the charge along the macrochains of the dielectric polymeric matrix.
Highlights
Composite materials based on dielectric polymer matrices and conductive polymers are promising components of a new generation of electro-optical devices: organic LEDs, flexible displays, display boards, environmental monitoring sensors [1,2,3]
The choice of polymethyl methacrylate (PMMA) as a dielectric polymeric matrix is due to the high optical transparency of the films based on it, which enables optical and electro-optical applications, namely obtaining films with electrochromic properties (”smart windows”), elements of optical sensors, various boards, and flexible displays and conductive composites for antistatic screens [7,8,9,10]
The aim of the work was to study the influence of the polymer matrix on the charge transport features in PMMA – PAN polymer nanocomposites obtained on the basis of polymer “blends” in a common organic solvent
Summary
Features of Charge Transport in Polymer Composites Polymethylmethacrylate - Polyaniline. The influence of polymer matrix of polymethyl methacrylate (PMMA) on the specific conductivity, percolation threshold, energy of activation of charge transport in polymer composites PMMA − polyaniline (PAN) is studied. Concentration dependence of the electrical conductivity of composites reveals percolation behavior with the low value of percolation threshold within 2 % content of polyaniline. It is found that in the polymer composites PMMA-PAN the specific conductivity increases by more than 8−9 orders of magnitude compared to the original matrix. On the base of temperature dependence of the specific conductivity of the obtained composites, it is concluded that PMMA polymer matrix does not change the semiconductor nature of PAN conductivity in the composite but effects on the activation parameters of the charge transport.
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