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Homogeneous metallocene/MAO‐catalyzed polymerizations of polar norbornene derivatives: copolymerizations using ethene, and terpolymerizations using ethene and norbornene
Author(s) -
Wendt Ralf Alexander,
Fink Gerhard
Publication year - 2000
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 - 10.1002/1521-3935(20000801)201:12<1365::aid-macp1365>3.0.co;2-o
Subject(s) - norbornene , polymer chemistry , monomer , chemistry , copolymer , addition polymer , polymer , catalysis , organic chemistry
Terpolymerizations of norbornene derivatives containing different functional substituents were carried out with ethene and norbornene using the homogeneous catalyst system iPr[CpInd]ZrCl 2 /MAO. The norbornene derivatives 5‐norbornene‐2‐methanol and 5‐norbornene‐2‐carboxylic acid were prereacted with triisobutylaluminium to prevent the deactivation of the catalyst. 13 C NMR studies revealed the composition of the polymer. The incorporation rate was 5–12 mol‐% at a content of 50 mol‐% of the norbornene derivative in the monomer feedstock. IR‐GPC coupled experiments confirmed the homogeneous composition of the polymer. In addition, we investigated the ethene copolymerization and the ethene/norbornene terpolymerization using the trialkylsilyl protected norbornene derivates such as 5‐norbornene‐2‐methyleneoxytriethylsilane and 5‐norbornene‐2‐methyleneoxy‐ tert ‐butyldimethylsilane. These norbornene derivatives reveal an incorporation rate of 5–6 mol‐% in the polymer at a content of 20 mol‐% in the monomer feedstock.