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Stereoblock Isotactic‐Hemiisotactic Poly(propylene)s and Ethylene/Propylene Copolymers Obtained with ansa ‐Cyclopenta[1,2‐b;4,3‐b′]dithiophene Catalysts
Author(s) -
Ewen John A.,
Jones Robert L.,
Elder Michael J.,
Camurati Isabella,
Pritzkow Hans
Publication year - 2004
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200300222
Subject(s) - tacticity , copolymer , polymer chemistry , ethylene propylene rubber , materials science , ethylene , metallocene , catalysis , polymerization , chemistry , organic chemistry , polymer , composite material
Summary: Stereoblock, isotactic‐hemiisotactic poly(propylene) is produced with C 1 ‐symmetric Me 2 C( η 5 ‐3‐(2‐adamantyl)‐C 5 H 3 )( η 5 ‐C 9 H 4 S 2 )ZrCl 2 ( 1 ). Ethylene/propylene copolymerization data with the C s ‐symmetric Me 2 C( η 5 ‐C 5 H 4 )( η 5 ‐C 9 H 4 S 2 )ZrCl 2 ( 2 ) metallocene reveals that it is highly propylene‐specific and that it produces more random ethylene/propylene copolymers than its fluorenyl analog.