Heats of immersion were obtained for four different organophilic
clay complexes in a series of normal alcohol-heptane mixtures
with alcohols of increasing chain length. The immersion calorimeter
employed was the Dewar type with a sensitivity of approximately
5 x 10⁻⁵°C.
Gel volumes were determined for two of the clay complexes...
A non-linear, parabolic type, mathematical model is presented, simulating the movement of an organophosphate insecticide, Vapona, in plasticized polyvinyl chloride (PVC). The molecular transport of diffusant in the polymer matrix and its subsequent desorption from the surface have been characterized in terms of the integral rate coefficient for diffusion and...