Metallocene catalysts form a new generation of catalysts for olefin polymerization after Ziegler-Natta catalysts. Compared with multi-active site catalysts, this kind of single-site catalysts has higher polymerization activity and produces polyolefin with narrower molecular weight distribution and composition distribution. Immobilization of metallocene catalysts on solid supports is an important step toward its industrial application, as it can largely overcome the drawbacks of homogeneous catalysts in controlling nascent polymer morphology. The amount of alkylaluminoxane cocatalyst can also be reduced after immobilization. Thus, research on immobilization of metallocene catalysts is still active in recent years. This paper reviews the progress in immobilization of metallocene cataylsts in recent ten years with emphasis on the morphologies and modifications of supports, immobilization methods of metallocene catalysts, and applications of supported metallocene catalysts. The prospects and development trends on immobilization of metallocene catalysts are also discussed.

Contents
1 Introduction
2 Morphologies of supports
2.1 Spherical supports
2.2 Tubular supports
2.3 Rodlike supports
2.4 Sheet supports
2.5 Irregular supports
3 Modifications of supports
3.1 Treatment with alkylaluminoxanes
3.2 Treatment with aluminum alkyls
3.3 Treatment with oxides
3.4 Treatment with chlorides
3.5 Treatment with silane compounds
3.6 Treatment with other modifiers
4 Immobilization methods of metallocene catalysts
4.1 Immobilization of bi-components
4.2 Immobilization of single components
5 Applications of supported metallocene catalysts
5.1 Polyethylene composites
5.2 Polypropylene composites
6 Conclusion and outlook