43 research outputs found
Application of the theory of dynamical systems for nonlinear analysis of multicomponent copolymerization
Calculation of the gel-point for non-equilibrium polycondensation taking into account the “substitution effect”
Scattering properties of gradient heteropolymers obtained by “living” free-radical copolymerization
An original, quantitative, theory of “living” radical
copolymerization has been developed proceeding from the current
concepts of its kinetics and mechanism. This theory enables one to
calculate both the dependence of monomers' conversion on time and
any statistical characteristics of the chemical structures of the
copolymers formed. Expressions have been derived describing the
angular dependence of the scattering amplitude of the
copolymerization products. The results of quantitative
calculations of these characteristics have been also presented to
exemplify the potentialities of the theory
Calculation of the polycondensation kinetics of monomers containing reaction centres of variable activity
Distribution of monomer units in products of homogeneous irreversible copolycondensation
Statistics of copolymer sequences obtained by polymeranalogous reactions of homopolymer globules
For the first time the macrokinetics of polymeranalogous reaction
in a homopolymer globule is considered theoretically.
Using mathematical apparatus of the theory of markovian stochastic processes
we examined the statistical characteristics of the chemical structure
of the emerging copolymers.
It is shown that when the reaction is kinetically-controlled the sequence distribution
of monomeric units in copolymer chains follows Bernoullian statistics.
In the opposite regime, when the reaction is diffusion-controlled
it is proved that the resulting primary structure is described by the Levy flight distribution.
Such copolymers with nonmarkovian character of the alteration of units
in macromolecules can not be synthesized
in the bulk or in concentrated solutions
by means of standard synthetic polymerization procedures