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Peculiar Catalytic Behavior of Poly(vinylidene fluoride) for Cationic Polymerization
Author(s) -
Yamamoto Katsuhiro,
Tanaka Hiroyuki,
Mouri Masashi,
Usami Kaori,
Sakaguchi Masato,
Shimada Shigetaka,
Sasaki Kanako,
Akiba Isamu
Publication year - 2004
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.200400194
Subject(s) - cationic polymerization , living cationic polymerization , vinyl ether , polymer chemistry , polymerization , copolymer , chemistry , monomer , ionic polymerization , isobutylene , vinyl polymer , ring opening polymerization , radical polymerization , polymer , materials science , organic chemistry
Abstract Summary: A cationic polymerization of isobutylene, isobutyl vinyl ether, ethyl vinyl ether, vinylcarbazole and α ‐methylstyrene was induced by mixing with poly(vinylidene fluoride) (PVDF) powder. The polymerization was an exothermic reaction and gave a high yield. An electron was abstracted from the monomer by PVDF. By the abstraction of the electron, the monomer was converted to a cation radical which induced polymerization. The generation of the cation radicals of the vinyl ethers was confirmed by an ESR spin trapping method, although the cation radicals could be coupled immediately. The resulting polymer was isolated from PVDF (not grafted) and characterized by size exclusion chromatography, IR, UV‐Vis and NMR spectroscopy. The copolymerization of vinyl ethers or vinyl ether/vinylcarbazole was carried out successfully to obtain their random copolymer. PVDF is regarded as a reusable catalyst for cationic polymerizations.Reaction mechanism of the cationic polymerization of iBVE.