Birefringence Dispersion of Poly (Phenyl Methacrylic) Ester of Cetyloxybenzoic Acid in Tetrachloromethane, Determined From Channeled Spectra

Optical Rotatory Dispersion of Poly(propylene oxide) in Benzene Solution Determined from Channeled Spectra

“…The method is detailed in previous works [14][15][16][17] and it was applied to polymer solutions. [18] The values of the wavenumbers in the maxima 1/2 k and minima k of the channeled spectra are used to determine the circular birefringence c n at a given wavelength, its dispersion, expressed by a-dimensional parameter and also the order k of the channels.…”

“…The circular birefringence is a dispersive and material dependent parameter. [14][15][16][17][18] The sign of the difference Usually their functioning is based on yellow radiation of a Na lamp.…”

“…The method of channeled spectra, initially applied to crystalline, [12][13][14] anisotropic polymer foils [15] or to thin layers of liquid crystals [16,17] in order to determine the linear birefringence, was extended to polymer solutions [18] for estimation optical rotatory dispersion. This is a fast and efficient method to characterize the anisotropy of the transparent layers.…”