TY - JOUR
T1 - Silica gel supported zirconocene dichloride/methylalumoxane catalysts for ethylene polymerization
T2 - Effects of heterogenation on activity, polymer microstructure and product morphology
AU - Janiak, Christoph
AU - Rieger, Bernhard
PY - 1994/2
Y1 - 1994/2
N2 - The system zirconocene dichloride/methylalumoxane was supported on silica in order to provide ethylene polymerization catalysts for suspension or gas phase processes. Highest activity was found for a sandwich‐like, three layer anchoring of the zirconium centers on the support surface. The new catalyst systems show a decrease of activity compared to polymerization experiments in homogeneous phase. However, the molecular weights are increased and the weight distributions remain narrow by immobilization of the active catalyst sites. Those supported metallocene catalysts could find application for the synthesis of polyethylene materials with controlled rheology.
AB - The system zirconocene dichloride/methylalumoxane was supported on silica in order to provide ethylene polymerization catalysts for suspension or gas phase processes. Highest activity was found for a sandwich‐like, three layer anchoring of the zirconium centers on the support surface. The new catalyst systems show a decrease of activity compared to polymerization experiments in homogeneous phase. However, the molecular weights are increased and the weight distributions remain narrow by immobilization of the active catalyst sites. Those supported metallocene catalysts could find application for the synthesis of polyethylene materials with controlled rheology.
UR - http://www.scopus.com/inward/record.url?scp=84889118347&partnerID=8YFLogxK
U2 - 10.1002/apmc.1994.052150105
DO - 10.1002/apmc.1994.052150105
M3 - Article
AN - SCOPUS:84889118347
SN - 0003-3146
VL - 215
SP - 47
EP - 57
JO - Die Angewandte Makromolekulare Chemie
JF - Die Angewandte Makromolekulare Chemie
IS - 1
ER -