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trichroism
(redirected from trichroic)

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trichroism [′trī‚krō‚iz·əm]
(optics)
Phenomenon exhibited by certain optically anisotropic transparent crystals when subjected to white light, in which a cube of the material is found to transmit a different color through each of the three pairs of parallel faces.
Trichroism

When certain optically anisotropic transparent crystals are subjected to white light, a cube of the material is found to transmit a different color through each of the three pairs of parallel faces. Such crystals are sometimes termed trichroic, and the phenomenon is called trichroism. This expression is used only rarely today since the colors in a particular crystal can appear quite different if the cube is cut with a different orientation with respect to the crystal axes. Accordingly, the term is frequently replaced by the more general term pleochroism. Even this term is being replaced by the phrase linear dichroism or circular dichroism to correspond with linear birefringence or circular birefringence. See Birefringence, Crystal optics, Dichroism
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Specific topics include measurements of the chemical and physical characteristics of polymers, depth profiling of polymers, measurement of the thermal and solar properties of polymers, polymer optical and dielectric properties, infrared linear dichroism of polymers, trichroic infrared measurements of orientation, dynamic infrared linear dichroism of polymers, analysis of rubber composites, and theory and applications of vibrational spectroscopy of conducting polymers.
Vibrational spectroscopy of polymers; principles and practice by SciTech Book News
Furthermore, a combination of IR trichroic analysis and TEM has been used to determine the orientation distribution function of montmorillonite platelets in Nylon-6 nanocomposite films [25].
An infrared method to assess organoclay delamination and orientation ... by IJdo, Wouter L.; Kemnetz, Steven; Benderly, Daphne / Polymer Engineering and Science
2 show the trichroic spectra obtained from the analysis (corresponding to polarization along the three directions MD, TD, and ND), together with the calculated structural factor spectrum SF.
Biaxial deformation of polyamide-6: assessment of orientation by ... by Cole, K.C.; Depecker, C.; Jutigny, M.; Lefebvre, J.-M.; Krawczak, P. / Polymer Engineering and Science
 
 
 
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