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Measurement of thermal properties of polyaniline/metal from room temperature to 170°C
Author(s) -
Joshi G. P.,
Saxe. S.,
Sharma T. P.,
Verma S.,
Dixit V.,
Mishra S. C. K.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12658
Subject(s) - polyaniline , thermal diffusivity , materials science , thermal conductivity , manganese , metal , analytical chemistry (journal) , atmospheric temperature range , thermodynamics , chemistry , composite material , polymer , metallurgy , polymerization , organic chemistry , physics
The heat transfer through polyaniline (PANI) mixed with metals (manganese and iron) is studied by measuring its effective thermal conductivity (λ e ) and effective thermal diffusivity (χ e ) from room temperature to 170°C at normal pressure. Simultaneous measurements of the λ e and χ e values of samples A (100% Fe), B (50% Fe and 50% Mn), and C (100% Mn) of the PANI mixtures with different percentages of Fe and Mn are carried out using the transient plane source technique. It is observed that the λ e and χ e of the above samples are almost independent of the temperature in a range of temperatures. However, maximum values for the λ e and χ e are found for sample A at ∼140°C, sample B at ∼130°C, and sample C at ∼120°C. An empirical relationship deduced from a polynomial fit of the experimental data is established for the temperature dependence of the λ e and χ e values of these samples. Reasonably good agreement is obtained between the theoretically predicted results and the experimental data. This behavior is explained on the basis of bond formation between the metals (Fe and Mn) and nitrogen of the PANI matrix. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 430–435, 2003