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Temperature dependence of the electrical conductivity of poly(Anthranilic acid)/magnetite nanocomposites and the applicability of different conductivity models
Author(s) -
Jayakrishnan P.,
Ramesan M.T.
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24271
Subject(s) - materials science , nanocomposite , conductivity , composite material , composite number , electrical resistivity and conductivity , activation energy , magnetite , arrhenius equation , chemistry , organic chemistry , metallurgy , electrical engineering , engineering
Electrically conductive composite materials based on poly(anthranilic acid) (PANA) and magnetite nanoparticles (Fe 3 O 4 ) were prepared by in situ chemical oxidative polymerization. Emphasis was given to study the effect of varying concentration of nanoparticles on the magnetic property, AC and DC conductivity of the nanocomposite in a broad range of frequencies at various temperatures. HRTEM and XRD were used to support the variation of electrical conductivity of the composite. AC conductivity of PANA/Fe 3 O 4 composites increase not only with the concentration of nanoparticles but also with the temperatures used in the study. The measured AC conductivity of composite materials showed a strong dependence on the frequency. The activation energy of the samples was calculated from the Arrhenius plots. DC conductivity of the nanocomposites increased with the increase in concentration of nanoparticles. The conductivity of nanocomposites were much higher than that of poly(anthranilic acid). The experimental values of the DC conductivity of composites were compared with the theoretical values using different models such as Scarisbrick, Bueche, McCullough equations. The theoretical conductivity of composite material from McCullough model was in good agreement with the experimentally determined conductivity. The magnetic properties of nanocomposites were studied using the vibration sample magnetometer. The saturation of magnetization increased with increasing the Fe 3 O 4 content in the polymer composite. POLYM. COMPOS., 39:2791–2800, 2018. © 2016 Society of Plastics Engineers