A rapid method of determining the aromatic polyamide content of dimethyl acetamide

Autor: Venediktova, A. G., Konovalova, M. V., Bykova, L. N.
Zdroj: Fibre Chemistry; September 1991, Vol. 22 Issue: 5 p357-359, 3p
Abstrakt: -- A rapid method of determining the polymer content of spinning solution in the concentration range from 7–20% by wt. has been developed; it is based on precipitation of the polymer in acetic anhydride, extraction of the solvent, and subsequent titration of it with perchloric acid. A comparison of the results obtained using the rapid procedure and the dry residue method has been carried out.
Databáze: Supplemental Index