Name
Babayan Alexander Lvovich
Scholastic degree
•
Academic rank
—
Honorary rank
—
Organization, job position
Krasnodar higher military aviation school of pilots
Web site url
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Articles count: 3
Surface energy of polymers determines such
important properties of polymers like wetability,
adhesion, ability adsorption of low molecular weight
substances. Inner organization, the structure of the
polymer and the dynamics of interaction between
macromolecular chains are shown at last. At the same
time, the micro-defects (inhomogeneity) of polymers,
which is an integral part of the structure are changed
during deformation and must contribute to changing
of the surface energy and its components.
This article solves the task of detecting changes in the
parameters of surface energy of polymers under
uniaxial deformation. Data for the quantitative
indicators of the surface properties total surface
energy and its dispersive and polar components are
presented. The calculations showed that the disperse
and polar components of all the samples of polymer
materials are about 98% of the total and, therefore, is
crucial. For the first time experimental data,
illustrating the change of surface energy of polymeric
materials had been obtained, including elastomeric
compositions, when uniaxial deformation. The
relative changes of the surface energy vary from 54.5
per cent to 125 %. A decrease of total surface energy
and its dispersion component is observed during
deformation of polymer samples of different structure
and chemical nature
Macrodeficiency of polymeric materials, including the
pervasive one, is a consequence of the development of
initial microdefects which appear in polymers both
due to external factors and during their processing. In
the article, the problem of the detection of structural
microdeficiency of various polymeric materials
through an assessment of their structural parameters is
solved. The considered materials possess
approximately identical degree of crystallinity (60 –
66%), but different density. The express assessment
technique of polymeric materials microdeficiency by
the sorption method with the use of the academician
M. M. Dubinin’s theory of volumetric micropore
filling is developed and evaluated. On the basis of a
quantitative assessment of sorption processes in
polymeric materials, including elastomeric
compositions – rubbers and rubberized fabrics, the
existence of the initial local microdefects arising in
the course of synthesis is established. In real
polymeric materials, including elastomeric
compositions – rubbers and rubberized fabrics, the
existence of the initial local microdefects arising in
the course of synthesis is established (the number of
microdefects n varies from 1x1017 sm-3 to 6x1019 sm-3
,
and the rated linear size k – from 2 nm to 7 nm). The
general reduction of microdeficiency in rubberized
fabrics in comparison with initial rubber is revealed
and rationalized
Macrodeficiency of polymeric materials, including the
pervasive one, is a consequence of the development of
initial microdefects which appear in polymers both
due to external factors and during their processing.
This article solves the task of identification the
interrelation and interdependence of structural
microdefects of various polymeric materials,
consisting in the estimation of the structural
parameters under uniaxial deformation. It is
experimentally shown that the process of changing
microdefects in the material bulk begins to flow more
intensely during deformation of the material, having
anisotropic structures in the bulk. Change of the
parameters of microdefects is not observed compared
to the starting material at small quantities of the
deformation. In the area of deformation corresponding
to the transition of the material from isotropic to
anisotropic state parameters of microdefects do not
depend on the degree of deformation of the sample,
and abrupt changes of the parameters of microdefects
are observed after completing the formation of
anisotropic patterns. It is shown experimentally the
identity of the parameters of microdefects in the bulk
material (rubber-based natural caoutchouc) during
deformation with the quantities of local deformations
at the edge of the artificially created macrodefects.
Under uniaxial deformation more than 280-300% and
the growth of the quantities of local deformations
come out at the edge of the artificially created
macrodefects and normalized linear dimension k and
decrease the total number n of microdefects