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Carbohydrate Modified Polysiloxanes, 3. Solution Properties of Carbohydrate‐Polysiloxane Conjugates in Toluene
Author(s) -
Loos Katja,
Jonas Gerd,
Stadler Reimund
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011101)202:16<3210::aid-macp3210>3.0.co;2-2
Subject(s) - chemistry , carbohydrate , monosaccharide , macromolecule , intermolecular force , intramolecular force , toluene , hydrogen bond , organic chemistry , moiety , polymer chemistry , molecule , biochemistry
High molecular weight poly(hydromethyl‐ co ‐dimethyl)siloxanes containing 0.6 and 3 mol‐% of Si—H units are polar functionalized by the addition of various mono‐, di‐ and oligosaccharides. Due to the hydrogen bond interaction between the carbohydrate moieties, the solution properties are strongly altered. Static and dynamic light scattering experiments as well as the dilute solution viscosities demonstrate the formation of intra‐ as well as intermolecular clustering. Despite the small number of carbohydrate groups, aggregation is very sensitive to the detailed chemical structure of the carbohydrate moiety. Disaccharides give rise to a stronger intramolecular clustering, while larger aggregates form in the case of monosaccharides. In addition, a surprising sensitivity of the macromolecular aggregation towards the stereochemistry of the carbohydrate residues is observed.