Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 4, pp. 568−574.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © V.T. Lebedev, Yu.V. Kul’velis, D.N. Orlova, E.Yu. Melenevskaya, K.V. Nasonova, L.V. Vinogradov, 2013, published in Zhurnal
Prikladnoi Khimii, 2013, Vol. 86, No. 4, pp. 609−615.
AND POLYMERIC MATERIALS
Structure Formation of Fullerene-Containing Propylene
Oxide Oligomers in Deuterium Water
V. T. Lebedev
, Yu. V. Kul’velis
, D. N. Orlova
, E. Yu. Melenevskaya
K. V. Nasonova
, and L. V. Vinogradova
Konstantinov Petersburg Institute of Nuclear Physics, National Research Center Kurchatov Institute, Gatchina,
Leningrad oblast, Russia
Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
Received February 6, 2013
Abstract—Structure formation of propylene oxide oligomers with terminal hydrophobic aliphatic fragment and
of oligo(propylene oxides) additionally containing covalently bonded fullerene С
in deuterium water was stud-
ied by small-angle neutron scattering. Propylene oxide chains containing a long hydrophobic fragment undergo
organization into spherical micelles, whereas the fullerene(С
)-containing derivatives form rodlike structures
(elongated “chains” of cross-linked micelles).
Poly(ethylene oxide) (PEO) occupies an important
place among water-soluble polymers widely used in phar-
maceutics and cosmetology. In cosmetics, PEO is used
most frequently in the form of gels [1–3]. However, PEO
is incapable of micelle formation, which restricts its use
for joint transport of water-soluble and fatty components.
Systems based on modiﬁ ed PEO, combining hydrophilic
and lipophilic (hydrophobic) properties, attract much
interest today. Such properties are exhibited by PEOs
weakly cross-linked under the action of accelerated elec-
trons or radiation. Such PEOs form networks containing
diphilic cells that are capable to retain not only water
with dissolved additives (salts, alcohol, glycerol, etc.),
but also a large amount of lipophilic components (oils)
without adding emulsiﬁ ers [4, 5].
Combination of hydrophobic and hydrophilic prop-
erties can also be attained by preparing star-shaped
structures in which hydrophilic PEO chains are bonded
to a hydrophobic branching center. Such polymers were
prepared by grafting of hydrophobic fullerene С
living PEO chains, but they strongly aggregate in solu-
tions [6, 7], which complicates their study in solutions.
As a rule, PEO macromolecules in aqueous solutions
undergo clusterization to form stack-like associates of
straightened chains [8–10], which strongly complicates
studying their structural and dynamic characteristics.
Previously  we described the synthesis of fullerene-
containing start-shaped structures based on PEO with
long hydrocarbon fragments at chain termini. It ap-
peared to be very difﬁ cult to take into account the effect
of the additional hydrophobic fragment in chains of
fullerene-containing PEO on the associative properties
of macromolecules, because the macromolecules formed
associates not only in water, but even in benzene ,
despite the fact that the PEO chains were relatively short
(MW ~5 × 10
). Strong associative interactions of С
containing PEOs (two PEO chains on С
center) in water,
extremely complicating determination of their molecular
characteristics, were also noted in .
derivatives exhibit biological
activity. In particular, they are capable of scavenging
of free-radical oxygen species . Therefore, they are
used as components not only of pharmaceuticals [14,
15], but also of cosmetics protecting the skin from UV