S. Talapatra et al., EFFECT OF SUBSTITUTION OF MONOESTER BY DIESTER ON TITANIUM-MAGNESIUM CATALYST PROPERTIES IN PROPENE POLYMERIZATION, Die Angewandte makromolekulare Chemie, 231, 1995, pp. 61-67
Titanium-magnesium catalysts (TMC), containing monoester (ethyl benzoa
te) as internal donor, can be transferred to the diester TMC by the tr
eatment with TiCl4 and dibutyl phthalate. The activity and the stereos
pecificity of the transferred TMC in propylene polymerization are clos
e to those of TMC prepared directly in the presence of diester. The su
rface area and the porous structure of both types of TMC were studied
and the correlation with the activity of these catalysts is discussed.