A new experimental method to measure the twist elastic constant of nematic liquid crystals is proposed. The method is based on a direct measurement of the torque which the nematic liquid crystal exerts on the surfaces when a magnetic field is applied. The reliability of this technique is tested by measuring the twist elastic constant of the nematic liquid crystal 4-n-pentyl-4 prime -cyanobiphenyl (5CB). The experimental results are compared with previous measurements performed by other authors.
NEW TORSION PENDULUM TECHNIQUE TO MEASURE THE TWIST ELASTIC CONSTANT OF LIQUID CRYSTALS
Palleschi;
1985
Abstract
A new experimental method to measure the twist elastic constant of nematic liquid crystals is proposed. The method is based on a direct measurement of the torque which the nematic liquid crystal exerts on the surfaces when a magnetic field is applied. The reliability of this technique is tested by measuring the twist elastic constant of the nematic liquid crystal 4-n-pentyl-4 prime -cyanobiphenyl (5CB). The experimental results are compared with previous measurements performed by other authors.File in questo prodotto:
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