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Homopolymerization and copolymerization of tert ‐butyl methacrylate and norbornene with nickel‐based methylaluminoxane catalysts
Author(s) -
Huang ChihFeng,
Wang ShihKai,
Kuo ShiaoWei,
Huang WuJang,
Chang FengChih
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20151
Subject(s) - methylaluminoxane , polymer chemistry , copolymer , norbornene , reactivity (psychology) , materials science , monomer , methacrylate , glass transition , catalysis , polymer , crystallinity , metallocene , chemistry , polymerization , organic chemistry , medicine , alternative medicine , pathology , composite material
The homopolymerization and copolymerization of tert ‐butyl methacrylate (tBMA) and norbornene (NB) with nickel(II) acetylacetonate in combination with methylaluminoxane were systematically investigated. This catalytic system showed high activity toward the homopolymerization of both NB and tBMA. For these copolymerizations, activity was gradually lost with an addition of tBMA to NB or of NB to tBMA. This result was qualitatively explained with the trigger coordination mechanism. Furthermore, the determination of the reactivity ratios indicated a significantly higher reactivity for NB than for tBMA ( r NB = 4.14 and r tBMA = 0.097), and this was interpreted by the coordination mechanism. The synthesized acrylate/NB copolymers exhibited glass‐transition temperatures of 100–250°C. The absence of crystallinity and the homogeneous repartition of the monomer units along the main chain yielded products with high transparency and high stability © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1824–1833, 2004