Spectroscopic manifestations of nitrile group intermolecular attraction in PAN

摘要

We studied the temperature behavior of the nitrile-stretching band during heating and cooling of polyacrylonitrile (PAN) and the effect of thermal treatment regimes on this behavior. The spectroscopic manifestations of nitrile group intermolecular pairing at temperatures below T-g and the polymer thermal expansion at temperatures higher than T-g were registered. A comparison of data obtained in different thermal regimes showed that the nitrile group intermolecular attraction influences both the cyclization reaction and its manifestation in the PAN infrared (IR) spectra. [References: 16]