Premium
Chain‐growth polycondensation of potassium 3‐cyano‐4‐fluorophenolate derivatives for well‐defined poly(arylene ether)s
Author(s) -
Suzuki Yukimitsu,
Hiraoka Shuichi,
Yokoyama Akihiro,
Yokozawa Tsutomu
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200350904
Subject(s) - condensation polymer , polymer chemistry , arylene , polymerization , chemistry , dispersity , monomer , ether , step growth polymerization , molar mass distribution , polymer , sulfolane , alkyl , solvent , organic chemistry , aryl
Polycondensation normally proceeds in a step‐growth reaction manner to give polymers with a wide range of molecular weights. However, the polycondensation of potassium 2‐alkyl‐5‐cyano‐4‐fluorophenolate ( 1 ) proceeded at 150°C in a chain polymerization manner from initiator, 4‐fluoro‐4′‐trifluoromethyl benzophenone ( 2 ), to give aromatic polyethers having controlled molecular weights and low polydispersities ( M w / M n ⩽ 1.2). The resulting polycondensation of 1 had all of the characteristics of living polymerization and displayed a linear correlation between molecular weight and monomer conversion, maintaining low polydispersities. Sulfolane was a better solvent for chain‐growth polycondensation of 1 than other aprotic solvents. The polyether from 1 with a low polydispersity showed higher crystallinity than that with a broad molecular weight distribution, obtained by the conventional polycondensation of 1 without 2 .