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6850585 
Journal Article 
Molecular interactions of carboxylated urethane acrylate ionomers in low-polarity and polar solvents 
Kim, JW; Kim, JW; Suh, KD; Suh, KD 
1999 
Yes 
Journal of Macromolecular Science: Part A - Pure and Applied Chemistry
ISSN: 1060-1325 
36 
12 
1967-1979 
WOS:000084610700008 
Carboxylated urethane acrylate ionomers that have a small number of ionic groups per chain were synthesized with varying the molecular weight of soft segment, the degree of ionization, and the sort of diisocyanate. The effect of intra- and intermolecular interactions on solution properties was studied by viscosity measurements in low-polarity and polar solvents. In a low-polarity solvent (1,4-dioxane), ionomers showed almost no intramolecular interaction at dilute concentration and a small degree of intermolecular interaction at high concentrations, resulting from a small number of ionic groups per chain. In a polar solvent (dimethylacetamide, DMAc), ionomers showed typical polyelectrolyte behavior, even though ionomers have a small number of ionic groups per chain. Intermolecular interaction caused by polyether soft segment, phenyl group, and hydrogen bond between urethane acrylate ionomer chains contributed to the increase of reduced viscosity at low concentration.< 
carboxylated urethane acrylate ionomers; low-polarity and polar solvents; intermolecular interaction; polyelectrolyte behavior; hydrogen bond 
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