Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-7504
Main Title: Fragmentable Heterogeneous Cocatalysts for the Metallocene-Catalyzed Polymerization of Olefins, I. Surface Modification of Silica and Characterization of the Resulting Carriers
Author(s): Schumann, Herbert
Widmaier, Ralf
Lange, Katharina C. H.
Wassermann, Birgit C.
Type: Article
Language Code: en
Abstract: Surface modification of pre-dried spherical silica nano-particles with diameters of 235 nm and 10 to 20 nm and of commercially available non-spherical silica materials using various aminoalkyltrialkoxysilanes and α-ω-bis(alkoxysilyl)organyls (organyl = alkanediyl, aminoalkanediyl, polyether, polysiloxane) has been performed in suspension in solvents with water. The quantity of water has a dominating influence, as compared to the amounts and the ratios of silanes employed, on the surface morphology of the modified silicas. The morphologies observed range from weakly linked aggregates of spherical particles to large agglomerates covered by thick irregular layers of organopolysiloxane, as demonstrated by scanning electron microscopy. These carriers can be modified further with organoaluminium compounds to yield heterogeneous cocatalysts for the polymerization of ethylene.
URI: https://depositonce.tu-berlin.de//handle/11303/8352
http://dx.doi.org/10.14279/depositonce-7504
Issue Date: 2005
Date Available: 15-Oct-2018
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Subject(s): Silica
surface modification
electron microscopy
Silanes
polymerization cocatalysts
Sponsor/Funder: BMBF, 03C0295, Verbundprojekt: Heterogene und homogene Cokatalysatoren und Katalysatoren für die Olefinpolymerisation
DFG, GRK 352, Synthetische, mechanistische und reaktionstechnische Aspekte von Metallkatalysatoren
License: https://creativecommons.org/licenses/by-nc-nd/3.0/
Journal Title: Zeitschrift für Naturforschung B
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 60
Issue: 6
Publisher DOI: 10.1515/znb-2005-0603
Page Start: 603
Page End: 613
EISSN: 1865-7117
ISSN: 0932-0776
Appears in Collections:Inst. Chemie » Publications

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