Journal of Polymer Science Polymer Chemistry Edition · 1975 · 198 citations · 7 references
Natural SciencesChemistryMaterials SciencePhysical ChemistryPolymer ChemistryPolymer MaterialsPolymer CharacterizationPolymer Physical ChemistryPolymer StabilityPolymer StructurePolymerization ChemistrySupramolecular PolymersComplexation ChemistryHydrophobic Interaction TheoryMacromolecular Complex FormationPolymer-solvent InteractionsPolymerization ReactionsStability Of Polymer Systems
Abstract An interpolymer complex was prepared by mixing aqueous solutions of poly(ethylene oxide) (PEO) and of a poly(carboxylic acid), i.e., poly(acrylic acid)(PAA), poly(methacrylic acid)(PMAA), or styrene‐maleic acid copolymer(PSMA). The complexation mechanism was discussed on the basis of results of such experimental methods as viscosity, potentiometric titration, and turbidimetry. The hydrogen bond is primarily involved in these complexations, but the influence of hydrophobic interaction on complexation can not be ignored. If the degree of dissociation α of carboxylic acid or the degree of polymerization P n of PEO was perceptibly changed, a stable complex was obtained at about α 0.1 or P n (PEO) = 40 for PMAA, 200 for PAA. This fact indicates that more than a definite number of binding sites are necessary for a stable interpolymer complex to be formed and that cooperative interaction among active sites plays an important role in complex formation.
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