A Rotating Specimen Mount for Use with X-Ray Spectrometer in Measuring Crystallite Orientation of Cellulosic and Other Textile Fibers

Abstract

The quantitative evaluation of crystallite orientation in textile fibers by x-ray methods is discussed. It is found that photographic recording and photometering of the resulting films can be replaced by automatic recording on a strip chart with the aid of an x-ray spectrometer with Geiger-Mueller counter. The design and details are given for a specimen holder capable of properly positioning and rotating a bundle of fibers in the x-ray beam so that the 002 or other selected diffraction arc passes before the window of the counter. A tentative procedure is outlined for evaluating, with the aid of this apparatus, the crystallite orientation of a bundle of cellulose fibers. Some typical recordings of the intensity curves of the 002 arcs from ramie, cotton, and high tenacity rayon are presented.