Low-temperature heat capacities of polyaniline and polyaniline polymethylmethacrylate blends
Raghunathan, Anasuya Kahol, Pawan K. Ho, J. C. Chen, Y.Y. Yao, Y.D. Lin, Y.
Raghunathan, Anasuya
Kahol, Pawan K.
Ho, J. C.
Chen, Y.Y.
Yao, Y.D.
Lin, Y.
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1998-12-15
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Raghunathan, A., Kahol, P., Ho, J., Chen, Y., Yao, Y., Lin, Y., & Wessling, B. (1998). Low-temperature heat capacities of polyaniline and polyaniline polymethylmethacrylate blends. Phys. Rev. B, 58, R15955–R15958.
Abstract
Heat-capacity measurements between 0.4 and 10 K have been made on doped polyaniline and its blends with polymethylmethacrylate. At lower temperatures, a finite electronic term (γ) prevails in all samples. The value of γ for polyaniline is 14 mJ/mol (Formula presented), but higher by a factor of about 6 for the blends. Using the free-electron model, the corresponding density of states at the Fermi level (Formula presented) are calculated and compared with that obtained from magnetic susceptibility measurements on the same samples. It is shown that caution must be used in determining (Formula presented) from magnetic susceptibility measurements in polyaniline and other less conducting polymeric materials. © 1998 The American Physical Society.
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American Physical Society
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Physical Review B - Condensed Matter and Materials Physics
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1098-0121