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- W1542644524 abstract "Abstract A series of amphoteric oligomeric surfactants (AO) and amphoteric polymeric surfactants (AP) containing both a 2-carboxyethyl (CE) group and a 2-hydroxyalkyl (C12-HA or C14-HA) group has been studied. The bobbin-like molecular structure of the micelle formed by these surfactants poly{[N-(2-carboxyethyl)-N′-(2-hydroxyalkyl)]aminoethylene} and the local movements of the molecular chain therein have been examined for pH dependence of 1H NMR spectroscopy on the CE HA ratio. From an analysis of chemical shifts and half-linewidths, the presence of micellar aggregates in a particular configuration has been inferred. The peaks of both and −CH2COO groups shift to a higher field with increasing pH (alkaline side). The half-linewidth is broad on the acidic side and narrow on the alkaline side. The dissociation occurs and the bobbin structure becomes loose. The dissociation constant and bulk behavior are also discussed using the Henderson-Hasselbach equation." @default.
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- W1542644524 date "1987-10-01" @default.
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- W1542644524 title "New amphoteric surfactants containing a 2-hydroxyalkyl group" @default.
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- W1542644524 doi "https://doi.org/10.1016/0021-9797(87)90304-3" @default.
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