Identification and quantitative determination of low-molecular-weight compounds and precipitation and plasticizing baths,and the effect of monomer-and solvent-contamination on their composition

Conclusions -- Using the liquid-chromatography method, a selective procedure has been developed for the quantitative determination of low-molecular compounds in the precipitation bath and the plasticizing bath.-- Identification of the PB composition. It has been shown that the low-molecular compounds evolved into the PB are not linear oligomers but polymetaphenylene isophthalamide, and presumptively, they have a cyclic structure.-- The effect of contaminants in isophthaloyl chloride and in dimethylacetamide on the quantitative and qualitative composition of the PB and P/B has been studied.-- It has been established that the main contaminants which affect the composition of PB are isophthalic and acetic acids.Translated from Khimicheskie Volokna, No. 5, pp. 35–37, September–October, 1991.