METHOD FOR QUANTITATIVE DETERMINING FREE PHENOL IN PHENOLS RESINS

摘要

SUMMARY: register IR absorption spectrum of the sample was determined by optical density at the maximum absorption bands at 690 and 1235 and calculated a phenol content in the sample from the ratio: C t / the KD690 / D1235, where C - Mass free phenol concentration in the phenol-aldehyde resin ., wt%; m - mass of phenol in the sample; m0 - mass of the resin used for analysis; Oeeo and D1235 - optical density at 690 and 1235 cm; K - a proportionality coefficient equal to 1,03-1,1. 1 tzbl.