Effect of Cellulose Suspension Agent Structure on the Particle Morphology of PVC. Part II. Interfacial Properties

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Abstract
The particle structure of polyvinyl chloride is controlled by the shear field imposed on the monomer droplet and the interfacial behavior of the vinyl chloride/water phases during polymerization. The interfacial tension in the presence of hydroxypropyl methylcellulose (HPMC) was measured as a function of concentration and temperature. The MW distribution of HPMC was determined by coupled GPC [gel permeation chromatography]-LALLS (low angle laser light scattering) technique. By monitoring the concentration of HPMC in the aqueous phase during polymerization, the coverage powers of HPMC were calculated and compared with the theoretical value based on Langmuir layer consideration. The effects of agitation on resin porosity were also examined. These results are discussed with respect to the particle structure.

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