Abstract
The adsorption of poly(vinyl alcohol) (PVA) stabiliser on vinyl chloride monomer droplets in aqueous suspensions has been studied experimentally using a 11 pressurised vessel. Some of the parameters affecting the interfacial adsorption have been identified and the results compared with existing literature. The experimental conditions used were similar to those used in the production of suspension PVC polymers. The saturation of the vinyl chloride/water interface was reached relatively quickly (5 min) with a surface coverage of about 2.6 mg m−2, while the stability of the formed vinyl chloride (VCM) droplets took much longer to establish (30 min). It was found that the turbulence intensity as well as the vinyl chloride drop size do not affect the PVA surface coverage. A multilayer system is formed when high concentrations of PVA are used. The quantity of PVA adsorbed was found to be proportional to the volume fraction of the dispersed phase.
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