Polymer-supported half-titanocene catalysts for the syndiospecific polymerization of styrene
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چکیده
منابع مشابه
Active site nature of magnesium dichloride-supported titanocene catalysts in olefin polymerization
Heterogeneous Ziegler-Natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. In our previous study, it was reported that MgCl2-supported titanocenecatalysts can generate both Ziegler-Natta-type and metallocene-type active sites according to the type of activators.The dual active site nature of the supported titanocene catalysts was furt...
متن کاملIN SITU SILICA SUPPORTED METALLOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION
Bis(2-R-ind)ZrCl2 (R: H or phenyl) was supported on different types of silica by in situ impregnation method and used for ethylene polymerization. In this method, the step of catalyst loading on support was eliminated and common alkyl aluminum (triisobutylaluminum, TiBA) cocatalyst was used instead of expensive methyl aluminiumoxane (MAO) cocatalyst in the polymerization. The effect of surface ...
متن کاملactive site nature of magnesium dichloride-supported titanocene catalysts in olefin polymerization
heterogeneous ziegler-natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. in our previous study, it was reported that mgcl2-supported titanocenecatalysts can generate both ziegler-natta-type and metallocene-type active sites according to the type of activators.the dual active site nature of the supported titanocene catalysts was furt...
متن کاملNanoparticle-Supported Molecular Polymerization Catalysts
Homogeneous molecular catalysts are immobilzed in a well-defined fashion on individual silica nanoparticles with a narrow particle size distribution by covalent attachment. This synthetic methodology is demonstrated with modified salicylaldiminato-substituted titanium(IV) complexes incorporating a trimethoxysilaneterminated linker: dichloro-bis[κ2-N,O-6-(3-(trimethoxysilyl)propoxyphenylimino)-2...
متن کاملKinetics and Morphology of Metallocene Catalyzed Syndiospecific Polymerization of Styrene in Homogeneous and Heterogeneous Reaction Systems
Title of Document: KINETICS AND MORPHOLOGY OF METALLOCENE CATALYZED SYNDIOSPECIFIC POLYMERIZATION OF STYRENE IN HOMOGENEOUS AND HETEROGENEOUS REACTION SYSTEMS Joong Jin Han, Doctor of Philosophy, 2008 Directed By: Professor Kyu Yong Choi Department of Chemical and Biomolecular Engineering Syndiotactic polystyrene (sPS) is a semicrystalline thermoplastic polymer with many advantageous properties...
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ژورنال
عنوان ژورنال: Journal of Polymer Science Part A: Polymer Chemistry
سال: 2000
ISSN: 0887-624X,1099-0518
DOI: 10.1002/(sici)1099-0518(20000101)38:1<127::aid-pola17>3.0.co;2-8