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Thermal conductivity and thermal diffusivity of poly(acrylic acid) by transient hot wire technique

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Abstract

The paper describes a new transient hot wire instrument which employs 25.4 μm diameter tantalum wire with an insulating tantalum pentoxide coating. This hot-wire cell with a thin insulating layer is suitable for measurement of the thermal conductivity and the thermal diffusivity of electrically conducting and polar liquids. This instrument has been used for experimental measurement of the thermal conductivity and the thermal diffusivity of poly(acrylic acid) solution (50 mass%) in the temperature range of 299 to 368 K at atmospheric pressure. The thermal conductivity data is estimated to be accurate within ±4%. Thermal diffusivity measurements have a much higher uncertainty (±30%) and need further refinement.

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Correspondence to R. C. Prasad.

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Tian, F., Sun, L., Venart, J.E.S. et al. Thermal conductivity and thermal diffusivity of poly(acrylic acid) by transient hot wire technique. J Therm Anal Calorim 96, 67–71 (2009). https://doi.org/10.1007/s10973-008-9840-2

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  • DOI: https://doi.org/10.1007/s10973-008-9840-2

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