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Molecular mass determination in the liquid crystalline state ‐ lyotropic cholesteric phase of a cellulose derivative
Author(s) -
Zugenmaier Peter,
Siekmeyer Maria
Publication year - 1992
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19920610132
Subject(s) - lyotropic , materials science , liquid crystal , phase (matter) , derivative (finance) , cellulose , lyotropic liquid crystal , solvent , reflection (computer programming) , wavelength , liquid crystalline , molecular mass , cholesteric liquid crystal , analytical chemistry (journal) , crystallography , chromatography , chemistry , organic chemistry , optoelectronics , enzyme , computer science , financial economics , economics , programming language
Lyotropic cholesteric phases of cellulose derivative/solvent systems exhibit a reflection wavelength or supermolecular helicoidal pitch dependency on molecular mass besides the well known variation of the pitch by temperature and concentration. This observation allows a molecular mass determination by spectroscopic means (UV/VIS‐, ORD‐, CD‐spectra) or by an evaluation of the colours seen in a polarizing microscope or by a direct measurement of the pitch with the Cano‐Grandjean technique.