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nematic phase |
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nematic phase [nə′mad·ik ‚fāz]
(physical chemistry) A phase of a liquid crystal in the mesomorphic state, in which the liquid has a single optical axis in the direction of the applied magnetic field, appears to be turbid and to have mobile threadlike structures, can flow readily, has low viscosity, and lacks a diffraction pattern. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | The sharp peak on (b) or (d) would suggest an ordered structure like a smectic phase since a nematic phase generally shows small broad peaks like a diffuse scattering halo at higher diffraction angles. From these diffractograms, it is also important to remark that the crystallization process of PEEK takes place in the presence of the nematic phase of Vectra[R] The presence of the crystalline reflections of PEEK has been observed over all composition ranges. Therefore, in the case of SAA, smectic phase instead of nematic phase is formed from isotropic phase. |
nematic phase |
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