Abstract
The morphology of polypropylene granules forming directly in the polymerization process was studied by scanning electron microscopy, and by adsorption and mercury-porometric methods. Separate structural elements were isolated which consisted of the polypropylene granules and a link was established between these and the structural elements of the catylast particles. A mechanism of formation of such granules has been established on the basis of the findings; it is suggested that the granules form on the internal surfaces of the porous catalyst.
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