Electromotive force studies associated with the binding of two cationic surfactants and their mixture to poly (ethylene glycol),poly(vinyl alcohol) and (vinyl acetate-ethylene) copolymer

摘要

Electromotive Force (EMF) measurements of the cationic surfactants,tetradecylpyridinium bromide (TPyB) and hexadecyltrimethylammonium bromide (HTAB) and their mixture in absence and presence of two non-ionic polymers,poly(ethylene glycol) (PEG),poly(vinyl alcohol) (PVA),and one non-ionic copolymer,vinyl acetatc-ethylene (Sok),are reported here.The polymer/surfactant complexes exist for those polymers whose microstruclures contain side groups with hydrophobic character.EMF curves for mixed surfactant systems show two breaks,C_1 and C_2 corresponding to two aggregation processes that is mainly attributed to structural transition of mixed micelles at C_1 with a further increase in surfactant concentration.The data also show the presence of interaction between mixed micelles and the neutral polymers.