Abstract
Abstract The monomer assembly in aqueous solutions of N,N-dimethylaminoethyl methacrylate (DMAEMA), ethylene glycol methacrylate (EGMA), oligo(ethylene glycol) methacrylate (OEGMA) and a series of methoxy oligo(ethylene glycol) methacrylates (MOEGMAs) with a variable number of ethylene glycol moieties was investigated by viscosity, surface and interfacial tension measurements, IR and NMR spectroscopy. All monomers were shown to exhibit interfacial activity. The isotherms of the specific viscosity for OEGMA and MOEGMAs exhibit the exponential growth which indicates the presence of sufficiently strong intermolecular noncovalent interactions; for DMAEMA and EGMA the isotherms pass through maxima. It is associated with the formation of monomer complexes due to hydrogen bonding. A combination of computer simulations, IR data analysis and viscosity isotherms allowed one to distinguish three concentration ranges in aqueous solutions of MEG and MOEGMA. These ranges are characterized by predominant types of assemblies with the participation of oxygen-containing functional groups of the monomers.
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