Recent development of olefin polymerization catalysts has caused marked changes in both industrial and academic research. Industrial use of homogeneous metallocene catalysts has already begun in the fields of high density polyethylene and syndiotactic polypropylene. Moreover, important data have been obtained from academic investigations which have proved useful for understanding conventional heterogeneous Ziegler-Natta catalysts. From the industrial viewpoint, however, heterogeneous high-yield catalysts seem to be more important.

The present volume contains invited lectures and contributed papers. The following topics are covered: (1) Heterogeneous Catalysts, (2) Metallocene Catalysts and (3) New Trends in the Polyolefin Industry.

Table of Contents

Articulation of kinetics of quasi-living stages to those of slurry polymerization and an unified explanation - propene polymerization with MgCl2EB/TiCl4-Al(C2H5)3 (T. Keii). Active sites and mechanisms of stereospecificity in heterogeneous Ziegler-Natta catalysts (P. Corradini et al.). Dependence of transient comonomer kinetics on catalyst design by magnesium chloride supported polymerization of ethene and propene (K.A. Solli et al.). A new mechanism for hydrogen activation in propene polymerization catalysts (A. Guyot et al.). Rate enhancement effects in the prepolymerization and copolymerization of ethylene and &agr;-olefins (P.J.T. Tait, I.G. Berry). Characterization of active sites in Ti/Hf/MgCl2 catalysts by chiral reagents (F. Masi, F. Menconi). A new polymer-supported catalyst for olefin polymerization (L. Sun et al.). Active center determination in Ziegler-Natta polymerization: An innovative dual-labeling approach (S.N. Gan et al.). Recent tendency of research targets for industrial polypropylene catalysts (M. Terano). The control of molecular weight distributions in Ziegler-Natta catalysis (R. Spitz et al.). Synthesis and application of terminally magnesium bromide-functionalized isotactic polypropene (T. Shiono et al.). Wide range control of microtacticity in propylene polymerization with heterogeneous catalyst systems (M. Kakugo). New heterogeneous catalysts for polyolefins (E. Albizzati et al.). Change of internal donor for Mg(OEt)2-supported TiCl4 catalyst (D.H. Lee et al.). Temperature programmed decomposition of MgCl2/THF/TiCl4 bimetallic complex catalyst and its effect on the homo- and copolymerization of ethylene (Y.S. Koo et al.). Characterization of Mg/Ti type catalysts prepared from different Mg components (M. Murata et al.). Mechanism of th


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© 1994
Elsevier Science
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