Polarized photoluminescence as well as birefringence measurements have been performed in different films of side-chain liquid crystal polyacrylates prepared by in situ photopolymerization. The polymeric systems contain a cyanoterphenyl chromophore covalently bound as a side group. The stability of the luminescence has been studied as a function of the composition and crosslinking of the polymer films. Although both the thermal quenching and the optical bleaching of the luminescence depend on the composition of the polymer matrix they seem to be independent of the crosslinking degree. Polymer films showing a stable luminescence with a high dichroic ratio have been obtained in copolymers combining mono and diacrylates having the same mesogenic core, with a low content (10%) of the diacrylate (crosslinking agent).
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Sánchez‐Somolinos et al. (2000) studied this question.
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