Side-chain liquid-crystalline polymers (linear and cross-linked) containing alkoxycyanobiphenyl as a mesogenic fragment were studied in solution and in bulk by FTIR spectroscopy. It was found for linear polymers that the transition from solution to bulk is accompanied by the appearance of new bands (satellites) at both sides of the C⋮N mode in the FTIR spectrum. Introducing nonmesogenic fragments into copolymer together with the network formation does not affect their number and frequencies but changes their relative intensities. The appearance of satellites is assumed to be connected with the appearance of conformational inhomogeneity of the aromatic cores of mesogenic fragments by the interaction of their dipoles. This assumption was confirmed by quantum chemistry calculations of model molecules.
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Lebedeva et al. (1998) studied this question.
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