Undulation textures at the phase transitions of some alkyloxybenzoic acids |
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Authors: | A. Sparavigna A. Mello G. Massa |
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Affiliation: | 1. Dipartimento di Fisica , Politecnico di Torino, C.so Duca degli Abruzzi 24 , Torino, Italy amelia.sparavigna@polito.it;3. Dipartimento di Fisica , Politecnico di Torino, C.so Duca degli Abruzzi 24 , Torino, Italy |
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Abstract: | We observed undulated smectic textures for some compounds of the 4,n-alkyloxybenzoic (nOBAC) acid series, at transitions between the smectic and the isotropic phase and between the smectic and nematic phase. Studied compounds were 12OBAC, 16OBAC and binary mixtures of 12- and 16OBAC. The undulations are dressing a usual Schlieren texture. An interesting fingerprint pattern is observed at the smectic-nematic in the case of the binary mixture, approximately 1 : 1 in weight. |
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Keywords: | liquid crystals phase transitions alkyloxybenzoic acids instabilities |
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