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Polymerization of 5‐vinyl‐2‐norbornene with TiCl 3 and alkylaluminium catalysts
Author(s) -
Endo Kiyoshi,
Fujii Kazuyoshi,
Otsu Takayuki
Publication year - 1996
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.1996.021970107
Subject(s) - copolymer , polymerization , polymer chemistry , monomer , norbornene , chemistry , organic chemistry , polymer
The polymerization of 5‐vinyl‐2‐norbornene (VNB) with TiCl 3 ‐alkylaluminium catalysts proceeded selectively via the vinyl group; the vinylene group in the bicyclic ring did not participate in the polymerization. The rate of polymerization of VNB was slow due to the steric effect of the side chain, but effects of the types of TiCl 3 and alkylaluminiums on the polymerization were observed. Hydrogen‐activated TiCl 3 plus Al(C 2 H 5 ) 3 revealed the highest catalytic activities among the catalysts examined. The monomer‐isomerization copolymerization of VNB and trans ‐2‐butene with TiCl 3 /Al( i ‐C 4 H 9 ) 3 afforded a copolymer consisting of VNB and 1‐butene units. The rate of copolymerization of VNB and 1‐butene was larger than the monomer‐isomerization copolymerization of VNB and trans ‐2‐butene. Copolymers rich in VNB units were produced easily by monomerisomerization copolymerization of VNB and trans ‐2‐butene.