Tailor-Made Polymers Via Immobilization of Alpha-Olefin Polymerization Catalysts

by Severn, John R.; Chadwick, John C.

• ISBN13: 9783527317820
• ISBN10: 3527317821
• Edition: 1st
• Format: Hardcover
• Copyright: 2008-03-31
• Publisher: Wiley-VCH

Summary

This first comprehensive handbook on this exciting field provides readers with a clear understanding of the current state of the art, ingenious solutions and opportunities. Researchers from academia and industry present such emerging topics as multi-component systems and computational chemistry, as well as the latest developments in competing and complementary technologies. The result is a well-balanced and up-to-date overview.

Author Biography

John Severn completed his Ph.D. at the University of Sussex and joined the group of Prof. R. van Santen at the Eindhoven University of Technology as a postdoc, working on the immobilization of alpha-olefin polymerization catalysts and the use of silsesquioxanes as homogeneous models. Then he joined the Dutch Polymer Institute working on the immobilization of single-site alpha-olefin polymerization catalyst, and with Avantium Technologies B.V. developing high throughput experimentation techniques for polyolefin catalysis. Since 2005 he has been a researcher at Borealis Polymer Oy, Finland.

John Chadwick received his Ph.D. from the University of Bristol, after which he joined Shell Research in Amsterdam. Following the formation of Montell Polyolefins, he transferred from Shell to the Montell (now Basell) research center in Ferrara, Italy, with special responsibility for fundamental Ziegler-Natta catalyst R&D. In 2001, he joined the polymer chemistry group at the Eindhoven University of Technology as Programme Coordinator for research on polyolefin catalysis and catalyst immobilization.

Table of Contents

Preface

List of Contributors

Designing Polymer Properties

Polyolefins

Levels and Scales of Polymer Structure and Modification

Polymer Design: The Catalyst's Point of View

Immobilizing "Single-site" Olefi n Polymerization Catalysts: The Basic Problems

Traditional Heterogeneous Catalysts

Ziegler-Natta Catalysts in Polyolefi n Synthesis

Chromium Polymerization Catalysts: Still Alive in Polyethylene Production

Polymer Particle Growth and Process Engineering Aspects

Heterogeneous Polymerization with Supported Catalysts versus Polymerization in Homogeneous Phase

Phenomena in Polymerization with Heterogeneous Catalysts

Polymerization Processes and Reactors for Polymerization with Heterogeneous Catalysts

Requirements for Polymerization Catalysts

Methylaluminoxane (MAO), Silica and a Complex: The "Holy Trinity" of Supported Single-site Catalyst

Introduction

Basic Ingredients

Catalyst Preparations

Pitfalls in the Generation of Single-Site Polymer Material

Conclusions

Perfl uoroaryl Group 13 Activated Catalysts on Inorganic Oxides

Introduction

Supported Perfl uoroarylborate Catalysts

Supported Perfl uoroarylborane and Perfl uoroarylalane Catalysts

Conclusions

Catalysts Supported on Magnesium Chloride

Introduction

Magnesium Chloride as Activator

Magnesium Chloride/Methylaluminoxane

Magnesium Chloride/Borate

Magnesium Chloride/Aluminum Alkyl

Conclusions

Metallocene Activation by Solid Acids

Introduction

Experimental

Results and Discussion

Metallocene Choice

Participation by Aluminum Alkyl

Bronsted versus Lewis Acidity

Polymer Molecular Weight Distribution

Leaching of the Metallocene

Characterization of Active Sites

Clay as an Activator

Zeolites as Metallocene Activators

Conclusions

Supported Multicomponent Single-Site ¿-Olefin Polymerization Catalysts

Introduction

Supported Catalysts for Concurrent Tandem Oligomerization/Copolymerization

Concurrent Tandem Catalysis for Increased Levels of Long-Chain Branching (LCB)

Supported Multicomponent Catalysts for Bimodal/Multimodal MMD Polyethylene

Multicomponent Catalysts for Polypropylene

Multicomponent Catalysts for Block Copolymers

Conclusions

Tethering Olefi n Polymerization Catalysts and Cocatalysts to Inorganic Oxides

Introduction

Surface-Tethered Precatalysts

Tethering Cocatalysts

Molecular Models

Conclusions

Polymerization with the Single-Site Catalyst Confi ned within the Nanospace of Mesoporous Materials or Clays

Introduction

Single-Site Catalyst Confi ned within the Nanopores of Mesoporous Materials

Single-Site Catalyst Confi ned within the Nanogalleries of Mineral Clays

Summary

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