Thermodynamic and elastic properties of polymer composites produced by supercritical dispersion
I.M. Abdulagatov1,2, E.G. Pashuk1, Z.Z. Abdulagatova3, A.G. Bakmaev4, Z.M. Omarov4, A.E. Ramazanova1, V.F. Khairudinov5, I.Sh. Khabriev5
1Institute for Geothermal Research and Renewable Energy of the Joint Institute for High Temperatures of the Russian Academy of Sciences, Makhachkala, Russia
2Dagestan State University
3Dagestan State University, Makhachkala, Russia
4Kh.I. Amirkhanov Institute of Physics, Makhachkala, Russia
5Kazan National Research Technological University, Kazan, Russia
Keywords: thermal conductivity, heat capacity, thermal diffusivity, polymer composite, density, elastic modulus
Abstract
The results of an experimental study of the thermal conductivity (λ), thermal diffusivity ( a ), heat capacity (Cp), density (ρ), and elastic moduli of four polymer composite samples as functions of temperature and pressure are presented. The polymers were synthesized by supercritical dispersion using a CO2 solution (SEDS). Thermal conductivity measurements were carried out in the temperature range from 293 K to 343 K at a pressure of 0.101 MPa; sample PP2 was studied at a pressure of up to 40 MPa using the stationary flat layer method. The thermal diffusivity coefficient was measured in the temperature range from 293 K to 368 K at atmospheric pressure using a Netzsch LFA 457 (Laser Flash, LFA) device using a non-contact method. The heat capacity of the same samples was measured in the temperature range from 129 K to 363 K using a DSC 204 F1 differential scanning calorimeter. The elastic moduli were obtained by measuring the propagation velocity of longitudinal and transverse ultrasonic waves using the pulsed method.
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