Novel bidentate phosphine modified Pd(acac)(2)/BF3OEt2 catalyst system for the homopolymerization of alkylnorbornenes and copolymerization with norbornene

Cited 16 time in webofscience Cited 15 time in scopus
  • Hit : 1142
  • Download : 177
The Pd(acac)(2) + nPh(2)P(CH2)(m) PPh2 + 25BF(3)OEt(2), n = 1-3, m = 1-6, catalyst system has been successfully employed for the homopolymerization of 5-alkyl-2-norbornenes and their copolymerization with norbornene. For this series, the most efficient catalyst system was Pd(acac)(2) + 2Ph(2)P(CH2)(4)PPh2 + 25BF(3)OEt(2). The activity of the catalyst system is comparable to that of most active late transition metal catalysts described in the literature. Bidentate phosphines containing bridges larger than 1,4-butane are likely to act as monodentate ligands. The incorporations of flexible alkyl groups Onto the main chain of norbornene, as well as copolymerization of 5-alkyl-2-norbornenes with norbornene, represent a useful method for lowering the glass transition temperature (T.), i.e. improving the processability. The introduction of bidentate phosphine ligand to the Pd(acac)(2) + 25BF(3)OEt(2) system switched the carbocationic polymerization mechanism to the coordination Ziegler-Natta polymerization. The simplicity of this catalytic system composition might be of industrial importance. (c) 2005 Elsevier B.V. All rights reserved.
Publisher
Elsevier Science Bv
Issue Date
2005-11
Language
English
Article Type
Article
Keywords

ADDITION POLYMERIZATION; FUNCTIONAL-GROUPS; METAL COMPLEXES; DERIVATIVES; METALLOCENE; STYRENE; (ETA(3)-ALLYL)PALLADIUM(II); POLY(5-ALKYL-2-NORBORNENE)S; SUBSTITUENT

Citation

APPLIED CATALYSIS A-GENERAL, v.296, no.1, pp.21 - 29

ISSN
0926-860X
DOI
10.1016/j.apcata.2005.07.056
URI
http://hdl.handle.net/10203/3522
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 16 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0