Makromolekulare Chemie Macromolecular Symposia · 1986 · 121 citations · 3 references
Natural SciencesChemistryMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsElastomeric PolymersPolymer CharacterizationPolymer ProcessingPolymer ThermodynamicsPolymerization ChemistryThermoplastic PolymersEthylene PolymerizationGlass TransitionPolyethylenePolypropylenePropylene PolymerizationZiegler - Natta CatalysisZiegler-natta Catalysis
Abstract With bis (cyclopentadienyl) zirconiumIV‐compounds and methylalumoxane as soluble Ziegler catalyst propylene can be polymerized to pure atactic polypropylene with molecular weights up to 600 000. The copolymerization of ethylene and propylene or butene gives elastomers with different properties. The butene units are distributed at random in the polyethylene chain as carried out by 13 C NMR measurements. The regiospecifity of the catalyst leads exclusively to the formation of head‐to‐tail enchainments. Using ethylene together with propylene and diolefins, EPDM rubber is formed. Glass transition temperatures of ‐60 to ‐50 °C could be observed.
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