Jr. Quintana et al., SOLUBILIZATION OF HOMOPOLYMERS BY BLOCK-COPOLYMER MICELLES IN DILUTE-SOLUTIONS - LASER-LIGHT SCATTERING AND VISCOSITY STUDIES ON MICELLAR SOLUTIONS, Journal of physical chemistry, 99(11), 1995, pp. 3723-3731
Light scattering and viscosity measurements on micellar solutions of b
lock copolymers were carried out in the presence of polyisobutylene. M
icelle size and molar mass were determined for micelles of polystyrene
-block-poly(ethylene/propylene) in 5-methyl-2-hexanone and 2-pentanone
and for micelles of lystyrene-block-poly(ethylene/butylene)-block-pol
y styrene in 3-methyl-2-pentanone in the presence of different percent
ages of polyisobutylene. As the percentage of homopolymer solubilized
in the micellar increases, the size and the aggregation number of the
micelles become larger. The temperature effect on micellar solutions w
as also studied. The presence of homopolymer in the micelle solutions
causes the so-called anomalous behavior. This becomes more intense as
the molar mass or the percentage of the homopolymer increases.