Messungen der Viskosität kristalliner Flüssigkeiten nach der Helmholtzschen Methode

Inelastic light scattering from the free surfaces of two nematic liquid crystals

“…In particular, for PAA at a temperature of 128 "C the viscosity is 77 =2.8 CP (Becherer and Kast 1942), the surface tension is a=38 dyn cm-1 (Naggiar 1943, Schwartz andMoseley 1947), and the density is p = 1.157 gm cm-3 (Chatelain 1937). For PAP at a temperature of 142 "C the surface tension is U = 36 dyn cm-1 (Schwartz and Moseley 1947) and the density is 1.092 gm cm-3 (Chatelain 1937).…”

Heats of Immersion. Vii. The Immersion of Silica, Alumina, and Titania in Hexane—variation With Particle Size and Outgassing Temperature

“…Calorimeter.-The calorimeter used in the present studies is a revised version of the type used previously.9 It is an adiabatic differential calorimeter with thermistor temperature sensing elements. It differs from the old design in the following ways: (1) provision has been made for handling 12 samples during a single run, (2) the sample breakers are coupled through the calorimeter head with brass diaphragms, and (3) the stirring is accomplished through a magnetic coupling. The object of the new design is both to obtain a maximum amount of information for a given filling^o f immersion liquid and to ensure complete vacuum sealing for the calorimeter vessels.…”