Effect of Chromium Compounds on Thermochemical Transformations of Graft Copolymers of Polycaproamide and Poly(Dimethylaminoethyl Methacrylate)

Abstract

IR spectroscopy and differential thermal and thermogravimetric analysis showed that impregnation of PCA fibre modified by grafting poly(dimethylaminoethyl methacrylate) (PDMAEMA) and chromium-containing compounds causes loss of thermoplasticity, accumulation of double bonds, a decrease in the maximum rate of decomposition, and an increase in coke residue. It was found that the yield of the final product increases in fabrication of carbon fibre from graft PCA—PDMAEMA copolymers in the presence of Cr(NO3)3 + (NH4)2HPO4. The carbon fibre containing chromium salts has a more developed pore structure than the initial fibre, as the almost ten-fold increase in the value of sorption of I2 indicates.