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Analysis of phenol-formaldehyde resols by gel permeation chromatography

1972; Wiley; Volume: 16; Issue: 7 Linguagem: Inglês

10.1002/app.1972.070160701

1097-4628

M. Duval, B. Bloch, Siegfried Kohn,

Advanced Chemical Sensor Technologies

Journal of Applied Polymer ScienceVolume 16, Issue 7 p. 1585-1602 Article Analysis of phenol-formaldehyde resols by gel permeation chromatography M. Duval, M. Duval Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this authorB. Bloch, B. Bloch Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this authorS. Kohn, S. Kohn Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this author M. Duval, M. Duval Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this authorB. Bloch, B. Bloch Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this authorS. Kohn, S. Kohn Office National d'Etudes et Recherches Aérospatiales, 92 Chatillon, FranceSearch for more papers by this author First published: July 1972 https://doi.org/10.1002/app.1972.070160701Citations: 67AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract The chromatographic analysis of resol solutions in tetrahydrofuran solvent, by means of a set of columns packed with crosslinked polystyrene gels, has been carried out with adequate resolving power for a clear-cut qualitative or semiquantitative differentiation between various types of resols to be practicable. The resulting chromatograms, which show the distribution of different constituents by molecular size, could be interpreted by the use of reference substance and by calibrating the system with a number of compounds of known structures. The method has been used to investigate the way in which various reaction parameters (nature of catalysts, proportion of starting material, treatments undergone by the resols) affect the composition of resols. Different commercial products have been thus characterized. It has also afforded an insight into the progress of the polycondensation reaction as a function of time and helped to state the reactivity of different groups and unblocked ring positions. Thus, an hydroxymethyl group appears to be more reactive in the para than in the ortho position. Otherwise the reactivity of unblocked ring positions would be enhanced by an hydroxymethyl group in the ortho rather than para position. Citing Literature Volume16, Issue7July 1972Pages 1585-1602 RelatedInformation