Ea. Lysenko et al., SOLUTION BEHAVIOR AND SELF-ASSEMBLY OF COMPLEXES FROM THYLSTYRENE)-BLOCK-POLY(N-ETHYL-4-VINYLPYRIDINIUM) CATIONS AND AEROSOL OT ANIONS, Macromolecules, 31(14), 1998, pp. 4516-4519
The solution behavior of stoichiometric complexes from ethylstyrene)-b
lock-poly(N-ethyl-4-vinypyridinium) cations (PMeS-b-PE4VP) and bis(2-e
thylhexyl)sulfonsuccinate (AOT) anions in a variety of organic solvent
s with low polarity is characterized. These complexes as well as the s
toichiometric complexes between homopolymer poly(N-ethyl-4-vinypyridin
ium) cations (PE4VP) and AOT were soluble in most common organic solve
nts except aliphatic hydrocarbons. Both PMeS-b-PE4VP- and PE4VP-based
complexes dissolve in hexane in the presence of small amounts of mixed
methanol-ethyl ether cosolvent. The PMeS-b-PE4VP/AOT complex forms st
able micelle-like aggregates with an effective diameter of ca. 70 nm u
nder these conditions. Such aggregates are not observed in the solutio
ns of the PE4VP/AOT complex, PMeS segments in the PiMeS-b-PE4VP/AOT co
mplex segregate into an insoluble core, while the PE4VP segments bound
with AOT stabilize these particles in solution. Such a type of morpho
logy has not been described and is unique for polymer-surfactant compl
exes.