Re-equilibration of poly-ε-aminocaproic acid: masking of amino and carboxyl endgroups due a reaction with an isocyanic acid ester
article
A recent paper by S. Smith on the re-equilibration of poly-ε-aminocaproic acid prompts us to publish some results of older date relating to investigations with a similar aim. At the beginning of our work on caprolactam polymerization, one of the main problems of our study was the re-formation of low molecular compounds (caprolactam and the cyclic and linear oligomers) on heating a previously extracted polymer. It was soon postulated that the endgroups of the polymer molecules might have an influence on the rate of re-equilibration. We then devised experiments to verifv this assumption, viz., the preparation of polymers with masked endgroups (either the amino or the carboxylic end group, or both being masked) and subsequent comparison of the rate of lactam formation, upon heating these products, with that of a normal polymer.
TNO Identifier
282869
Source
Journal of Polymer Science, 37(132), pp. 547-550.
Pages
547-550
Files
To receive the publication files, please send an e-mail request to TNO Repository.