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T. V. Panova, V. B. Rogacheva, A. B. Zezin
Different types of phase
separation in the polycomplex gels based on lightly cross-linked polyanion and
poly(propylene imine) dendrimer
Abstract
Various types of structural organization of polycomplex
gels based on lightly cross-linked anionic sulfonate gel and AstramolTM poly(propyleneimine)
dendrimer of 4th generation were studied. It was shown, that along with macroscopic
two-phase structure of core-shell type, which is formed in the process of activated
dendrimer sorption, microheterogeneous composite with polycomplex phase
particles of micron dimensions uniformly distributed in the network matrix is
also formed. Such microheterogeneous composites are formed as a result of
dendrimer molecules redistribution in the lightly cross-linked anionic gel
under dendrimer charge change. Parameters of polycomplex gel microheterogeneous
structure formed were evaluated by the laser scattering technique. It was
found, that the sizes of dendrimer aggregates depend on the network degree of
swelling.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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