VIBRATIONAL SPECTRAL STUDY OF MOLECULAR ORIENTATION IN VITREOUS FIBERS
MetadataShow full item record
Publisher:Ohio State University
Preferential orientation of polymeric chains with respect to the principal axis in completely non-crystalline, vitreous fibers is demonstrated by laser Raman and infrared reflectance studies of sodium metaphosphate glass fibers. The polarization dependences of Raman intensities in 24 scattering arrangements have been obtained by varying the incident and scattered radiation propagation and polarization directions and are compared to calculated Raman intensity ratios for uniaxial orientation of the chains. Infrared dichroic ratio data were obtained from a Kramers-Kronig transformation analysis of polarized reflection spectra on oriented fibers, and employed to compute the distribution of the angles the metaphosphate chains make with the fiber axis.
Author Institution: Department of Chemistry, Brown University