METHOD OF DETERMINING HYDROXYL GROUP CONCENTRATION IN AND 4,4'- ISOPROPYLIDENEDIPHENOL-EPOXIDE RESINS

摘要

FIELD: analytical methods. SUBSTANCE: resin is treated with 0.1-0.2 M solution of maleic anhydride in methyl ethyl ketone in presence of 0.5-1 M solution of triethylamine in methyl ethyl ketone as catalyst at elevated temperature. Unreacted anhydride is then hydrolyzed and hydroxyl group concentration is determined by potentiometric titration with alkali. EFFECT: increased accuracy and reproducibility of determination at reduced power consumption and shortened analysis time. 2 tbl, 3 ex