Determination of the molecular orientation of poly(propylene terephthalate) fibers using polarized Raman spectroscopy: a comparison of methods.
Frisk S, Ikeda RM, Chase DB, Rabolt JF. Determination of the molecular orientation of poly(propylene terephthalate) fibers using polarized Raman spectroscopy: a comparison of methods. Appl Spectrosc. 2004 Mar; 58(3):279-86.