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The activation of MgCl2-supported ziegler-natta catalysts: A structural investigation

✍ Scribed by P. Galli; P. Barbè; G. Guidetti; R. Zannetti; A. Martorana; A. Marigo; M. Bergozza; A. Fichera

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
369 KB
Volume
19
Category
Article
ISSN
0014-3057

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✦ Synopsis

A mathematical procedure for the investigation of the lattice disorder by stacking faults in polycrystalline solids has been used in studying samples of MgCI 2 activated by ball milling for various times in the presence of TIC14. These samples have been investigated by X-ray diffraction and by measurements of surface area, crystaltite dimensions, Ti content after washing and catalytic activity in the polymerization of ethylene.

A good relationship has been confirmed between activation time and activity; furthermore, the structural variations introduced by ball milling are mainly associated with rotational disorder of the CI-Mg C1 triple layers. Nevertheless, the analysis by X-ray diffraction is not unequivocal about the relationships between structure and activity: other significant parameters, such as the surface area and the porosity, are probably very important.

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