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Cationic polymerization of isobutylene proceeding by redox initiation
Author(s) -
Marek Miroslav,
Pecka Jan,
Halaška Vlastimil
Publication year - 1995
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.1995.021960821
Subject(s) - cationic polymerization , isobutylene , polymerization , chemistry , polymer chemistry , ionic polymerization , living cationic polymerization , lewis acids and bases , dichloromethane , chain growth polymerization , chain transfer , polymer , organic chemistry , copolymer , ring opening polymerization , radical polymerization , catalysis , solvent
The cationic polymerization of isobutylene with weak Lewis acids, such as BBr 3 and FeBr 3 , has been studied. These halides are unable to induce individually the polymerization in nonpolar solvents, such as heptane or toluene, or they only initiate the polymerization to low conversions in polar media, such as dichloromethane. The complex compounds, formed by interaction of both Lewis acids, initiate a fast polymerization of isobutylene, which proceeds up to high conversions. The coinitiation effect of HBr in the mixture with BBr 3 and FeBr 3 was also investigated. The hypothetic formation of efficient initiators and the initiation mechanism of olefin polymerization are discussed on the basis of the ionogenic action of both Lewis acids.