19—viscose Rayon Fibres: Ii—the Orientations of Skin and Core

Polymer applications

“…Birefringence is measured by either the Becke Une (immersion) method or a compensator method [2] (Sections 2.2.4 and 3.4.3). The Becke Une method [19] measures the surface birefringence, whereas compensator methods measure the average birefringence of the fiber [20]. Combination of these methods provides a useful measure of the differential birefringence, a skin-co re effect, if it is present.…”

Polymer applications

“…Specimen preparation methods include direct observation and sectioning. The Becke line method [19] measures the surface birefringence, whereas the compensator method measures the average birefringence of the fiber [20]. Birefringence, the difference between the refractive index parallel and perpendicular to the fiber axis, is an important quantitative measure of molecular orientation [18].…”