Catalytic Role of Bimetallic Core Towards Olefin Polymerizations pp. 187-208
Authors: (Srinivasa Budagumpi and Il Kim, The WCU Center for Synthetic Polymer Bioconjugate Hybrid Materials, Department of Polymer Science and Engineering, Pusan National University, Busan, Republic of Korea)
Abstract: Binuclear bridged and non-bridged transition metal catalysts with definite electronic and steric modulations currently attract significant attention in the catalysis community, mainly because cooperative effects of adjacent metal ions are expected to lead to unique activation modes towards olefin polymerizations and to novel reactivity patterns. Cooperative effects between adjacent catalytic centers in binucleating ligands with aliphatic/aromatic spacers were shown to induce significant rate and selectivity enhancements in ethylene and α-olefin oligo/polymerizations. The binuclear metallocene catalysts are fascinating because of their beneficial effects in the formation of polymers for various explicit applications. In this chapter, we essentially made an attempt to focus on the catalytic role of bimetallic core towards olefin polymerizations. A comprehensive overview of this topic, which the present review is aimed at giving, seems appropriate and timely. In the main stream of this chapter, we tried to cover the recent applications of atom/bond bridged bimetallic coordination and organometallic catalysts with well defined architectures over their monometallic counter parts and an account on the usage and precise applications of supported bimetallic metallocene catalysts.