Experimental Determination of the Fiber Orientation Parameters and the Raman Tensor of the 1614 cm-1 Band of Poly(ethylene terephthalate)
Journal of Molecular Sttructure
Polarized Raman spectroscopic measurements were performed on uniaxially oriented fibers of poly(ethylene terephthalate). The diagonal Raman tensor for the 1614 cm−1 band along with the second- and fourth-order coefficients of the orientation distribution function are determined from the Raman scattering intensities as a function of spin-speed. The development of an oriented-amorphous material within the fiber is explained. The elements of the Raman tensor appear to vary as a function of spinning speed. This observation calls into question the use of isotropic values for the Raman tensor when determining the orientation.
Fiber orientation parameters, Raman tensor, Poly(ethylene terephthalate)
Lesko, Cherish Christina, "Experimental Determination of the Fiber Orientation Parameters and the Raman Tensor of the 1614 cm-1 Band of Poly(ethylene terephthalate)" (2000). Engineering and Computer Science Faculty Publications. 348.