USE OF COULTER COUNTER FOR INVESTIGATING COAGULATION KINETICS OF MIXED MONODISPERSE PARTICULATE SYSTEMS

The Coulter counter has been used to investigate the particle size distributions of polystyrene and polyvinyl toluene latices. The distributions have been shown to be closely log normal over the major part of their extent. Mixtures of two latex species have been examined in cases where overlap of the distributions does and does not occur. It has been shown that, in agreement with the conclusions of earlier workers, the measured distributions are broader than would be expected from the manufacturer's figures. The change in particle size profile of mixtures has been examined when coagulation occurs, and this has been compared to computer-predicted profiles. The significance of the results in terms of the coagulation behavior of supracolloidal suspensions is discussed. © 1968.