The course of the cross amidation reaction in the system polycaprolactam‐low molecular amide has been followed by measuring changes in viscosity. Conversion curves were plotted from data on the decrease in viscosity of a solution of the polyamide in the low molecular amide at the reaction temperature. Conventional reagents for the hydrolytic and catalytic polymerization of the caprolactam were employed as catalysts.
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Wichterle et al. (1961) studied this question.
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