caa a22 4500 465755518 CHVBK 20180323111846.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF00500843 doi (NATIONALLICENCE)springer-10.1007/BF00500843 Thermal properties of aqueous solutions of polyvinylpyrrolidone in the temperature range 20-80°C [Elektronische Daten] [A. Dakroury, M. Osman, A. El-Sharkawy] The thermal properties (thermal diffusivity a, thermal conductivity λ, and volumetric heat capacity ρC p) of aqueous solutions of polyvinylpyrrolidone (PVP) were measured in the temperature range 20-80°C. The measurements were carried out using the hot-wire (strip) technique. Three different average molecular weights of PVP were used [M = 10,000 (PVP-10), M = 24,500 (PVP-24.5), and M = 40,000 (PVP-40)], i.e., the average degrees of polymerization are 90, 220, and 360, respectively. The results show that the values of the thermal properties depend on the temperature and the concentration of PVP in the medium. The mechanism of heat transfer was discussed. The role of convection and radiation were taken into consideration. Plenum Publishing Corporation, 1990 heat capacity nationallicence hot-wire technique nationallicence polyvinylpyrrolidone nationallicence thermal conductivity nationallicence thermal diffusivity nationallicence Dakroury A. Physics Department, University College for Women, Ain Shams University, Heliopolis, Cairo, Egypt aut Osman M. Physics Department, University College for Women, Ain Shams University, Heliopolis, Cairo, Egypt aut El-Sharkawy A. Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt aut International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/3(1990-05-01), 515-523 0195-928X 11:3<515 1990 11 10765 https://doi.org/10.1007/BF00500843 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00500843 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dakroury A. Physics Department, University College for Women, Ain Shams University, Heliopolis, Cairo, Egypt aut NATIONALLICENCE 700 1- Osman M. Physics Department, University College for Women, Ain Shams University, Heliopolis, Cairo, Egypt aut NATIONALLICENCE 700 1- El-Sharkawy A. Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt aut NATIONALLICENCE 773 0- International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/3(1990-05-01), 515-523 0195-928X 11:3<515 1990 11 10765 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer