| Abstract: | Conclusions -- The qualitative and quantitative analysis for the content of oligomers in aqueous solutions in caprolactam regeneration may be carried out by the liquid-chromatography method after selective extraction of the monomer.-- The decisive role of compactness and of contact surface of the oligomer molecules in hydrophobic-dispersion interaction with chemically modified silica gel and in effect on retention time in the chromatographic system has been demonstrated.-- The proposed procedure is characterized by accuracy and reproducibility of the results and can be recommended for scientific and also for manufacturing purposes.Institute of Pneumatic Tires and Polyamide Fibres (Vidin, Bulgaria). Translated from Khimicheskie Volokna, No. 5, pp. 57–59, September–October, 1992. |
