The effect of the grain morphology on the plasticization and properties of plasticized pvc and VC-VAc copolymers. Part II. Changes in PVC grain morphology during suspension polymerization
The effect of the grain morphology on the plasticization and properties of plasticized pvc and VC-VAc copolymers.
Part II. Changes in PVC grain morphology during suspension polymerization
The samples of PCW-S64 polyvinyl chloride taken from a commercial-scale autoclave during suspension polymerization have been investigated. The aim of these investigations has been to find correlation between the PVC grain structure and some physical properties of the polymer. Depending on the degree of conversion, the structure of grains in individual samples from the polymerization process has been vvry diverrified. Up to the degree of conversion of about 70 per cent grains are mainly composed of primary particles, their aggregates being covered with a durable coat. At higher degrees of conversion, on the surface of grains there appear globular aggregates, particles of the „indented ball” type as well as regions of typically porous structure.
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