Die Makromolekulare Chemie · 1963 · 20 citations · 12 references
Natural SciencesChemical EngineeringChemistryCatalysisInorganic ChemistryPolymer ChemistryCatalyst DesignCatalytic MaterialsPolymer SynthesisPolymerization ChemistryPolymerization KineticsPolymerization ProcessesActivation EnergyCatalyst ActivationCatalyst KineticsCatalytic ActivityCationic PolymerizationMole RatiosOlefin Polymerization KineticsPolymerization Catalysts
Abstract In some titanium chloride‐aluminum alkyl systems examined only TiCl 4 and TiCl 3 Al(C 2 H 5 ) 3 were found to be effective in cis ‐1,4 polymerization of isoprene; in cationic polymerization Al(C 2 H 5 )Cl 2 gave a resinous product. The catalytic activity in cis ‐1,4 polymerization was strongly dependent on the starting mole ratios of aluminium to titanium and monomer to titanium. A peak in the activity was shown at about 1.3 of the Al/Ti ratio, and two peaks appeared at about 60 and 125 of monomer to titanium ratio. The polymerization has an activation energy of about 22 kcal./mole at constant catalyst level. The overall reaction appeared to be proportional to [Ti] [M]. Two different types of copolymer were found from isoprene and styrene with TiCl 4 Al(C 2 H 5 ) 3 , suggesting a polyactivity of the catalyst system.
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Kinetic studies of α‐olefin polymerization
G. Natta · Journal of Polymer Science · 1959 · 203 citations