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Electrospray ionization mass spectrometry was applied to determine the molecular weight distribution and the number average molecular weight of the commercially available gemini surfactant α,α′-[2,4,7,9-tetramethyl-5-decyne-4,7-diyl]bis[ω-hydroxylpoly(oxyethylene)], Surfynol 465 (S465), with NaCl and KCl as the cationization agents. The enthalpies of S465 micelle formation in aqueous solution were...
The solubility and the micelle formation of the chiral cationic surfactant (1R,2S)-(−)-N-dodecyl-N-methylephedrinium bromide (DMEB) in aqueous solution were investigated by conductometry and titration microcalorimetry in the temperature range of 278–328K. The Krafft temperature of DMEB is T K =280K and the solubility of the surfactant at this point is 4.5mM. The cmc versus T curve passes through...
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