par De Rycker, M.;Defay, Raymond 
Référence Bulletin des Sociétés chimiques belges, 65, 9-10, page (794-808)
Publication Publié, 1956
Référence Bulletin des Sociétés chimiques belges, 65, 9-10, page (794-808)
Publication Publié, 1956
Article révisé par les pairs
| Résumé : | During the measurement of the surface tension of solutions by the ring method, on a moving surface, the part of the surface enclosed in the ring reaches a steady state corresponding to an aging different from the aging of the outside part. One can avoid this difficulty by the method of the dipping plate. The errors due to the Archimede's force and to the lift force of the liquid flow are eliminated by using a very thin plate of mica. The horizontal parts of the curves, surface tension versus rate of flow, are similar to those observed by the ring method but are higher. This confirms that the new method eliminates the error due to the aging of the surface enclosed in the ring. This method is applied to aqueous solutions of adipic acid, azelaic acid and sebacic acid. The adipic acid reaches its static value of surface tension too quickly and the dynamic values cannot be measured by this method. The time evolution of the two others acids is easily observed. Copyright © 1956 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
