ISSN:
1572-9567
Schlagwort(e):
heat capacity
;
hot-wire technique
;
polyvinylpyrrolidone
;
thermal conductivity
;
thermal diffusivity
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract 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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00500843
