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Peculiarities of the Schlieren Textures in Lyotropic Nematic Mesophases

100%

Nesrullajev A., Kazanci N.

Acta Physica Polonica A

1999

vol. 95

issue 6

931-937

In the present paper the peculiarities of schlieren textures of lyotropic nematic mesophases have been investigated by polythermic polarization microscopy and capillary temperature wedge methods. The lyotropic nematiccalamitics (N_{c}) and lyotropic nematic-discotics (N_{d}) formed in binary and ternary systems on the base of tetradecyldimethyl amino bromide and tetradecyldimethyl amino oxide have been the subjects of our investigations. The dynamics of time and temperature transformations of schlieren textures have been studied. The comparative estimation of schlieren textures of N_{c} and N_{d} mesophases has been performed. The optical force and optical sign of the schlieren textures observed have been determined.

Phase States in Potassium Oleate+Water and Potassium Oleate+Water+Decanol Lyotropic Systems

81%

Nesrullajev A., Kazanci N., Yildiz T.

Acta Physica Polonica A

1998

vol. 94

issue 1

25-32

In this work the investigations of the characteristic textures and the dynamics of their concentration and temperature transformations in potassium oleate+water lyotropic system have been carried out. The effect of the decanol on lyotropic mesomorphism as well as on the character of typical textures and the concentration ranges of lyotropic liquid crystalline mesophases have also been studied. The phase states diagrams of the potassium oleate+water and potassium oleate+decanol+water lyotropic liquid crystalline systems are presented.

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2 Acta Physica Polonica A

1 1999

1 1998

2 Kazanci N.

2 Nesrullajev A.

1 Yildiz T.

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Peculiarities of the Schlieren Textures in Lyotropic Nematic Mesophases

Phase States in Potassium Oleate+Water and Potassium Oleate+Water+Decanol Lyotropic Systems