Abstract
The temperature-dependence of the H. L. B. number of plyoxyethylene cetyl alcohol ether (POECAE) was studied from the relative viscosity of its aqueous solution. The measuraments were done by Ubbelode-type viscometer at the temp erature range of 20-70°C, of which results were applied to Jones and Dole's equation. It was found that:
(1). The viscosity B-coefficient of POECAE was dependent on the temperature. It decreased with the increase of temperature. This seems to be due to the breakage of hydration shell.
(2). A good corelationship existed between viscosity-B-coefficient and H. L. B. value.
(3). Since the viscosity B-coefficient decreased with the increase of temperature, the hydrophobic properties increase and the H. L. B. value of POECAE changes to a lower value.
