Measurements of the adhesive force between particles of powdered organic substances and a glass substrate by means of the impact separation method. I. Effect of temperature.

Abstract

The effect of temperature on the adhesive force between particles of powdered organic substances (butyl p-hydroxybenzoate and sulfadimethoxine) and a glass substrate was investigated by means of the impact separation method using a pendulum-type shock testing machine. At elevated temperatures, a remarkable increase in adhesive force with heating time was observed. The adhesive force at a given heating time increased with rising temperature and a linear relationship existed between the logarithm of adhesive force and the reciprocal of temperature (°K) for each sample. The results were interpreted in terms of the growth of a solid neck between a particle and the substrate.