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High‐speed living ring‐opening polymerization by a new catalyst based on metalloporphyrin
Author(s) -
Inoue Shohei,
Aida Takuzo
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930730105
Subject(s) - polymerization , ring opening polymerization , porphyrin , polymer chemistry , monomer , molar mass distribution , catalysis , chemistry , polymer , living polymerization , photochemistry , radical polymerization , organic chemistry
Polymerization of ϵ‐caprolactone and δ‐valerolactone initiated with aluminum porphyrin (1) was much accelerated by the addition of methylaluminum diphenoxide with bulky substituents 2, to give polymers with narrow molecular weight distribution. The polymerization of β‐butyrolactone was also accelerated by 2, to different extents depending on the mode of ring scission. 2 also accelerated the living polymerization of propylene sulfide initiated with zinc porphyrin (3). The effect of 2 is due to the coordinative activation of monomer.