Thermotropic liquid crystalline polymers, 4. Study of crystalline and liquid‐crystalline comb‐like polymers with mesogenic side groups by IR spectroscopy

The IR spectra (in the region of 400–3600 cm −1 ) of comb‐like polymers in crystalline, liquid‐crystalline, and fluid isotropic phases were studied, and the effect of the chemical structure of the long side chains on the crystalline and liquid‐crystalline states were examined. The spectroscopic criteria of phase transitions in comb‐like polymers were established and the fragments of the side chains involved in the formation of the liquid‐crystalline phase, were determined.