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Ethylene/1‐Hexene Copolymers Produced with MAO/(nBuCp) 2 ZrCl 2 Supported on SBA‐15 Materials with Different Pore Sizes
Author(s) -
Paredes Beatriz,
Grieken Rafael van,
Carrero Alicia,
Suarez Inmaculada,
Soares Joao B. P.
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100062
Subject(s) - copolymer , ethylene , 1 hexene , polymer , hexene , materials science , polymerization , polymer chemistry , catalysis , amorphous solid , microstructure , chemical engineering , amorphous silica , chemistry , organic chemistry , composite material , engineering
The influence of the support architecture (structure and pore size) on the activity of MAO/(nBuCp) 2 ZrCl 2 heterogeneous catalysts in the polymerization of ethylene and 1‐hexene is studied through the characterization of the polymers' microstructure. SBA‐15 silica‐based mesostructured materials are synthesized with different pore sizes and compared with commercial silica. All SBA‐15 supported catalysts lead to higher catalytic activities than amorphous silica and give rise to ethylene/1‐hexene copolymers with bimodal CCD, which suggests that the carrier structure plays an important role not only in the global rate of the process but also in the copolymer composition. The structures and pore sizes of the support show a marked influence on the polymer CCD shape.