Kinetics, Polymer Molecular Weights, and Microstructure in Zirconocene-Catalyzed 1-Hexene Polymerization - Published online 1 September 2000 - 1-Hexene was polymerized by rac-(dimethylsilyl)bis(4,5,6,7-tetrahy- dro-1-indenyl)zirconium dichloride (I) catalyst and methylaluminoxane cocatalyst over the temperature range 0-100 (degree)C. The polymerization rate, polymer molecular weight, and polymer microstructure (stereospecificity and regiospecificity) were studied as a function of the temperature and the concentrations of monomer, catalyst, and cocatalyst./