Molecular Orientation Distribution of Regenerated Cellulose Fibers Investigated with Polarized Raman Spectroscopy
Journal article, 2019

The molecular orientation distribution of polymeric fibers influences physical properties. We present a novel method of analyzing polarized Raman experiments to determine molecular orientation, which is based on exchanging the Legendre polynomial approach with a wrapped Lorentzian function, as determined from a prescreening of X-ray scattering patterns. This method removes the need for performing right angle scattering experiments while avoiding common approximations. The molecular orientation of regenerated cellulose fibers, using the presented method, is shown to correlate well with X-ray scattering and an analogous experiment using solid-state NMR spectroscopy. Challenges of quantitatively measuring molecular anisotropy occur with semi-crystalline, partially modified, or composite materials. As such, a plethora of techniques, each with a unique chemical selectivity, is paramount for material characterization.

Author

Leo Svenningsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Lars Nordstierna Group

Yuan-Chih Lin

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Maths Karlsson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Anna Martinelli

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Anna Martinelli Group

Lars Nordstierna

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Lars Nordstierna Group

Macromolecules

00249297 (ISSN) 15205835 (eISSN)

Vol. 52 10 3918-3924

Subject Categories

Physical Chemistry

Polymer Technologies

Other Chemistry Topics

DOI

10.1021/acs.macromol.9b00520

More information

Latest update

7/15/2019