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Title of article :
Zirconocene catalyst well spaced inside modified montmorillonite for ethylene polymerization: role of pretreatment and modification of montmorillonite in tailoring polymer properties
Author/Authors :
Chengbin Liu، نويسنده , , Tao Tang، نويسنده , , Baotong Huang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
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Abstract :
Zirconocene catalyst was heterogenized inside an organosilane-modified montmorillonite (MMT) pretreated by calcination and acidization, for supported catalyst systems with well-spaced α-olefin polymerization active centers. The varied pretreatment and modification conditions of montmorillonite are efficient for supported zirconocene catalysts in control of polyethylene microstructures, in particular, molecular weight distribution. In contrast to other supported catalyst systems, Cp2ZrCl2/modified montmorillonite(MMT-7)-supported catalysts with a distinct interlayer structure catalyzed ethylene homopolymerization and copolymerization with 1-octene activated by methylaluminoxane (MAO), resulting in polymers with a bimodal molecular weight distribution (MWD).
Keywords :
CeO2–ZrO2 , Pd TWC , CO oxidation , XRD , Raman , in situ DRIFTS , in situ XANES , EPR , NO reduction
Journal title :
Journal of Catalysis
Journal title :
Journal of Catalysis
Serial Year :
Link To Document :