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A novel synthetic route to poly(β‐ketone)s via poly(alkoxyethyne)s
Author(s) -
Shoda Shinichiro,
Komenoi Akio,
Fujioka Tomochika,
Okumura Yasunori,
Kobayashi Shiro
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.1996.021970218
Subject(s) - alkoxide , polymer chemistry , ketone , moiety , polymerization , catalysis , chemistry , hydrolysis , lewis acids and bases , transition metal , organic chemistry , polymer
Isopropoxyethyne (1a) and tert ‐butoxyethyne (1b) were polymerized using group 5 and 6 transition metal catalysts to give poly(isopropoxyethyne) (2a) and poly( tert ‐butoxyethyne) (2b) , respectively. The weight‐average molecular weight ( M̄ w ) of the resulting poly(alkoxyethyne)s was up to 1.0 × 10 4 . Among the transition metal catalysts, a tungsten alkoxide or a molybdenum alkoxide having low Lewis acidity were found to effectively promote the polymerization without causing side reactions. Poly( tert ‐butoxyethyne) was successfully converted to poly(β‐ketone) 3 by acid hydrolysis of the tert ‐butyl vinyl moiety.