Preparation of monodisperse hydrophilic polyamide by anionic polymerization of bicyclic oxalactam
- 1 May 1989
- journal article
- research article
- Published by Wiley in Journal of Polymer Science Part A: Polymer Chemistry
- Vol. 27 (6) , 1915-1923
- https://doi.org/10.1002/pola.1989.080270613
Abstract
The preparation of a monodisperse hydrophilic polyamide was achieved in the anionic polymerization of a bicyclic oxalactam, 8‐oxa‐6‐azabicyclo[3.2.1]octan‐7‐one (abbreviated BOL) with the use of N‐benzoyl BOL and potassium pyrrolidonate (2 and 0.5 mol % to BOL, respectively) in dimethyl sulfoxide at 25°C. The number‐average molecular weight of the polyamide increased in direct proportion to the monomer conversion, and was consistent with the value calculated from the amounts of the consumed monomer and activator. The molecular weight distribution (MWD) of the polyamide obtained until the middle stage of polymerization (polymerization time, < 10 min; monomer conversion, < 60%) was found to be narrow (Mw/Mn = 1.1). The MWD was gradually broadened in the later stage of the polymerization, which may result from the redistribution of molecular weight of the resulting polyamide not only by the polymerization–depolymerization equilibrium, but also by transamidation between polymer chains.Keywords
This publication has 21 references indexed in Scilit:
- Synthesis of new functional polymers by living cationic polymerizationMakromolekulare Chemie. Macromolecular Symposia, 1988
- Living carbocationic polymerization. IV. Living polymerization of isobutyleneJournal of Polymer Science Part A: Polymer Chemistry, 1987
- Crystal Structures of 8-Oxa-6-azabicyclo[3.2.1]octan-7-one and the 4(e)-Bromo-substituted DerivativeBulletin of the Chemical Society of Japan, 1986
- Preparation of block- and graft copolymers starting from a bicyclic oxalactamDie Makromolekulare Chemie, 1985
- ‘Immortal’ polymerization. Polymerization of epoxide catalysed by an aluminium porphyrin–alcohol systemJournal of the Chemical Society, Chemical Communications, 1985
- Isomerization of polyamide prepared from bicyclic oxalactamJournal of Polymer Science: Polymer Chemistry Edition, 1983
- Synthesis and Polymerization of an Optically Active Bicyclic Oxalactam. A Novel Hydrophilic Polyamide Membrane Prepared from (+)-(1R,5S)-8-Oxa-6-azabicyclo[3.2.1]octan-7-oneMacromolecules, 1980
- Polymerization of Bicyclic Oxalactam. A Novel Polyamide Poly(tetrahydropyran-2,6-diyliminocarbonyl)Macromolecules, 1977
- Studies on anionic polymerization of lactams. Part III. Copolymerization of pyrrolidone and caprolactamJournal of Polymer Science Part A-1: Polymer Chemistry, 1967
- Studies on anionic polymerization of lactams. Part II. Effect of cocatalysts on the polymerization of pyrrolidoneJournal of Polymer Science Part A-1: Polymer Chemistry, 1966