Research output: Contribution to journal › Article › peer-review
Influence of a strong polyelectrolyte block on the formation and properties of polymer micelles with a mixed corona. / Lysenko, E. A.; Kulebyakina, A. I.; Grinevich, R. S.; Chelushkin, P. S.; Zezin, A. B.
In: Polymer Science - Series A, Vol. 54, No. 4, 04.2012, p. 255-263.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Influence of a strong polyelectrolyte block on the formation and properties of polymer micelles with a mixed corona
AU - Lysenko, E. A.
AU - Kulebyakina, A. I.
AU - Grinevich, R. S.
AU - Chelushkin, P. S.
AU - Zezin, A. B.
N1 - Funding Information: 1This work was supported by the Russian Foundation for Basic Research (project no. 10 03 00392 a) and the Ministry of Edu cation and Science of the Russian Federation (State Contract 02.740.11.0266).
PY - 2012/4
Y1 - 2012/4
N2 - Joint micellization of two amphiphilic diblock copolymers is studied by velocity sedimentation, transmission electron microscopy, electrophoretic mobility measurements, and static light scattering. One of the diblock copolymers is a strong polyelectrolyte (polystyrene-block-poly(N-ethyl-4- vinylpyridinium bromide)), while the second one is a weakly charged or uncharged copolymer (polystyrene-block-poly(acrylic acid) or polystyrene-block-poly(4- vinylpyridine)). It is shown that the mixing of the diblock copolymers in a selective aqueous-organic solvent (DMF-methanol-water) leads to the formation of joint (hybrid) micelles and that the composition of these micelles is close to the composition of the polymer mixture. Micelles consist of an insoluble polystyrene core and a mixed corona composed of blocks of a strong polyelectrolyte and a weakly charged or uncharged copolymer. Aqueous dispersions of mixed micelles are obtained with the use of the dialysis technique, the spherical morphology of the micelles is ascertained, and their three-layered structure is proposed. The nonlinear dependence of the molecular mass of micelles on their composition is found. The decisive effect of electrostatic repulsion between strong polyelectrolyte units on the thermodynamics of micellization and the dispersion stability and molecular-mass characteristics of the mixed micelles is demonstrated.
AB - Joint micellization of two amphiphilic diblock copolymers is studied by velocity sedimentation, transmission electron microscopy, electrophoretic mobility measurements, and static light scattering. One of the diblock copolymers is a strong polyelectrolyte (polystyrene-block-poly(N-ethyl-4- vinylpyridinium bromide)), while the second one is a weakly charged or uncharged copolymer (polystyrene-block-poly(acrylic acid) or polystyrene-block-poly(4- vinylpyridine)). It is shown that the mixing of the diblock copolymers in a selective aqueous-organic solvent (DMF-methanol-water) leads to the formation of joint (hybrid) micelles and that the composition of these micelles is close to the composition of the polymer mixture. Micelles consist of an insoluble polystyrene core and a mixed corona composed of blocks of a strong polyelectrolyte and a weakly charged or uncharged copolymer. Aqueous dispersions of mixed micelles are obtained with the use of the dialysis technique, the spherical morphology of the micelles is ascertained, and their three-layered structure is proposed. The nonlinear dependence of the molecular mass of micelles on their composition is found. The decisive effect of electrostatic repulsion between strong polyelectrolyte units on the thermodynamics of micellization and the dispersion stability and molecular-mass characteristics of the mixed micelles is demonstrated.
UR - http://www.scopus.com/inward/record.url?scp=84862101513&partnerID=8YFLogxK
U2 - 10.1134/S0965545X12040050
DO - 10.1134/S0965545X12040050
M3 - Article
AN - SCOPUS:84862101513
VL - 54
SP - 255
EP - 263
JO - Polymer Science - Series A
JF - Polymer Science - Series A
SN - 0965-545X
IS - 4
ER -
ID: 86146880