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Elastomers by atactic linkage of α‐olefins using soluble Ziegler catalysts
Author(s) -
Kaminsky W.,
Schlobohm M.
Publication year - 1986
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19860040114
Subject(s) - elastomer , polypropylene , polyethylene , copolymer , ethylene , ethylene propylene rubber , materials science , catalysis , polymer chemistry , polymer science , polymerization , natural rubber , glass transition , butene , ziegler–natta catalyst , epdm rubber , polymer , chemistry , organic chemistry , composite material
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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