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Some two‐, three‐ and four‐component phenolic copolymers have been characterized, and mixed in definite stoichiometric proportions. The total amount of acidic and basic functional groups in a given weight of the copolymer mixture have been calculated from the characteristic parameters of the polymer components. Analysis of these copolymer mixtures by electrometric titration techniques revealed an excellent correlation between the calculated and observed values of functional groups.

Phenolic block copolymers have been prepared by condensation of p-cresol-formaldehyde and p-toluidine-formaldehyde homopolymer chains. The compositions of the copolymers have been determined by electrometric titrations in non-aqueous solvents. Efforts have been made to correlate structural features of the copolymers, such as intramolecular hydrogen bonding, and the probable number of phenolic and aromatic amine units in the respective blocks of the copolymer chain with their titration curves. ZUSAMMENFASSUNG:Phenolblockcopolymere wurden durch Kondensation von Homopolymerketten aus p-Kresol-Formaldehyd und p-Toluidin-Formaldehyd hergestellt. Die Zusammensetzung der Copolymeren wurde mit Hilfe von elektrometrischen Titrationen in nichtwmrigen Losungsmitteln bestimmt. Es wurde versucht, die strukturellen Kennzeichen der Copolymeren wie intramolekulare Wasserstoffbindung und die wahrscheinliche Zahl der phenolischen und aromatischen Amineinheiten in den entsprechenden Blocken der Copolymerketten mit ihren Titrationskurven zu korrelieren.