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

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. -- The procedure developed is characterized by accuracy and rapidity in the determination.