Leo Svenningsson: Orientation Distributions of Regenerated Cellulose Fibers

​Molecular orientation of fibers has a strong correlation with macroscopic tensile strength, accessibility for chemical modification and, to some extent, texture and visual appreciation of textiles. A probability density function describing the orientation distribution can be derived from directly from wide angle X-ray diffraction (crystalline parts only) or from contributions of Legendre polynomial functions measured from rotor synchronized solid-state NMR spectroscopy, polarized Raman spectroscopy, and birefringence. These methods have successfully been used for oriented polymers such as polyethylene terephthalate but the solid-state NMR and polarized Raman methods has yet to be successfully applied and evaluated for regenerated cellulose fibers. Here we present a theoretical framework and comparison with focus on WAXD and polarized Raman spectroscopy in the context of regenerated cellulose fibers.
Category Popular Science Presentation
Lecturer Leo Svenningsson
Start 2/22/2018 10:55:00 AM
End 2/22/2018 11:25:00 AM
Location Room KC, Chemistry at MSGSD 2018
Campus Johanneberg