Pol(ethylene glycol) Graft Copolymers Containing Carboxylic Acid Groups: Aggregation and Viscometric Properties in Aqueous Solution

Helene Dérand, Bengt Wesslén, Bengt Wittgren, Karl-Gustav Wahlund

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

34 !!Citations (SciVal)

Sammanfattning

Poly(ethylene glycol) monomethyl ethers (MPEG) were grafted on copolymers of maleic anhydride and styrene, methyl methacrylate, and ethylhexyl methacrylate, respectively. Hydrolysis of the remaining anhydride residues gave graft copolymers carrying a large number of carboxylic acid groups along the main chains. The properties in aqueous solutions of these graft copolymers were studied with respect to aggregation behavior and viscometric properties, Aggregation of the polymers was examined by quasi-elastic light scattering and now field-flow fractionation in water and KCl solution. Both methods showed that the anionic graft copolymers mainly were present as single molecules in pure water, with a minor fraction of aggregates. In KCI solution, aggregates with average sizes of approximately 30 nm were the dominant species. In aqueous solution, the polymers exhibited polyelectrolyte behavior, i.e., a dramatic increase of the viscosity upon neutralization. Graft copolymers with hydrophobic groups in the backbone had lower viscosities.
Originalspråkengelska
Sidor (från-till)8770-8775
TidskriftMacromolecules
Volym29
Utgåva27
StatusPublished - 1996

Bibliografisk information

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Engineering (011001014), Analytical Chemistry (S/LTH) (011001004), Department of Chemistry (011001220)

Ämnesklassifikation (UKÄ)

  • Kemiteknik
  • Analytisk kemi

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