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Structural study of fractionated hydroxyethyl‐amylopectin in aqueous solution
Author(s) -
Sarazin D.,
Fraņois J. H.,
Verwaerde C.,
Fléche G.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070460418
Subject(s) - amylopectin , size exclusion chromatography , small angle x ray scattering , multiangle light scattering , light scattering , molar mass , scattering , steric effects , aqueous solution , static light scattering , gel permeation chromatography , chemistry , materials science , radius of gyration , scaling law , laser , scaling , chromatography , optics , starch , organic chemistry , polymer , physics , amylose , mathematics , geometry , enzyme
Fractionated hydroxyethyl starch was well characterized by coupled LALLS‐SEC (lowangle laser light scattering and steric exclusion chromatography), QELLS (quasi‐elastic laser light scattering), MALLS (multiangle laser light scattering), and viscosimetry. The scaling laws of the molecular weight dependences of the following dimensions are found to exhibit low exponents consistent with a highly grafted structure:\documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm Intrinsic viscosity}} \hfill & {\left[ {\eta _{{\rm 37 = 0}{\rm .0023}} M^{0.33} \left( {{\rm dl g}^{ - 1} } \right)} \right]} \hfill \\ {{\rm Hydrodynamic radius of gyration}} \hfill & {R_H = 0.110M^{0.37} \left( {{\rm nm}} \right)} \hfill \\ {{\rm Static radius of gyration}} \hfill & {R_z = 0.022M^{0.48} \left( {{\rm nm}} \right)} \hfill \\ \end{array} $$\end{document} Additional X‐ray synchrotonic scattering (SAXS) studies permit us to give a preliminary description of the internal structure of the macromolecules.