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Neutral Polymeric Surfactants Derived from Dextran: A Study of Their Aqueous Solution Behavior
Author(s) -
Rotureau Elise,
Chassenieux Christophe,
Dellacherie Edith,
Durand Alain
Publication year - 2005
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/macp.200500252
Subject(s) - hydrodynamic radius , dextran , polymer , chemistry , amphiphile , aqueous solution , intrinsic viscosity , polysaccharide , polymer chemistry , dynamic light scattering , viscosity , chemical engineering , organic chemistry , copolymer , materials science , nanoparticle , engineering , composite material
Summary: Amphiphilic polysaccharides are obtained by hydrophobic modification of a neutral bacterial polysaccharide, dextran. By reacting the polysaccharide with aliphatic epoxides (epoxyoctane and epoxydodecane) in dimethyl sulfoxide, a series of amphiphilic polymers is obtained which covers a large range of structural parameters (length of the polysaccharide, number and nature of hydrocarbon moieties). The solution behavior of dextran derivatives is first characterized by viscometric measurements in dilute and semi‐dilute domains. The effects of molecular parameters on polymer viscosity behavior are evidenced and discussed. Information on the state of aggregation of polymers is obtained by the use of static and dynamic light scattering. The presence of aggregates in the dilute domain is clearly evidenced and their structural characteristics are estimated (size, molecular weight and number of aggregation). The aggregates are shown to account for the viscometric results in the examined concentration range, relating their chemical parameters (hydrodynamic radius and molecular weight) to the macroscopic behavior of the solutions.