Due to the great contribution in high polymer production, Karl Ziegler and Giulio Natta were awarded the Nobel Prize in Chemistry in 1963. The discovery of their catalysts initiated an era of producing polymers via coordination polymerization mechanism. Coordination polymerization of olefins allows precise control over the microstructures of the polymer products, and has experienced great developments during the past half century. Polyolefins produced by Due to the great contribution in high polymer production, Karl Ziegler and Giulio Natta were awarded the Nobel Prize in Chemistry in 1963. The discovery of their oils initiated an era of producing polymers via coordination polymerization mechanism. Coordination polymerization of olefins allows precise control over the microstructures of the polymer products, and has experienced great developments during the past half century. Polyolefins produced by