Karpova S.G., Iordanskiy A.L., Motyakin M.V., Olkhov A.A., Lomakin S.M., Berlin A.A. Ultrathin Poly(3-hydroxybutyrate) Fibers: Structure and Dynamic Characteristics
DOI: http://dx.doi.org/10.15688/jvolsu10.2016.2.4
ULTRATHIN POLY(3-HYDROXYBUTYRATE) FIBERS: STRUCTURE AND DYNAMIC CHARACTERISTICS
Svetlana Gennadyevna Karpova
Senior Researcher,
Institute of Biochemical Physics named after N. M. Emanuel, RAS
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Kosygina St., 4, 119334 Moscow, Russian Federation
Aleksey Leonidovich Iordanskiy
Doctor of Chemical Sciences, Professor,
Head of Laboratory of Diffusion Phenomena in Polymer Systems,
N. N. Semenov Institute of Chemical Physics, RAS
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Kosygina St., 4, 119991 Moscow, Russian Federation
Mikhail Viktorovich Motyakin
Doctor of Chemical Sciences, Professor,
N. N. Semenov Institute of Chemical Physics, RAS
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Kosygina St., 4, 119991 Moscow, Russian Federation
Anatoliy Aleksandrovich Olkhov
Candidate of Technical Sciences, Associate Professor,
Senior Researcher, Laboratory of Prospective Compositional Materials and Technologies,
Russian University of Economics named after G. V. Plekhanov
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Stremyanny Pass., 36, 117997 Moscow, Russian Federation
Sergey Modestovich Lomakin
Candidate of Chemical Sciences, Head of Laboratory of Chemical Firmness of Polymers,
Institute of Biochemical Physics named after N. M. Emanuel, RAS
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Kosygina St., 4, 119334 Moscow, Russian Federation
Aleksandr Aleksandrovich Berlin
Doctor of Chemical Sciences, Professor, Academician of RAS,
Director of N. N. Semenov Institute of Chemical Physics, RAS
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Kosygina St., 4, 119991 Moscow, Russian Federation
Abstract. Structural and dynamic analysis based on combined thermophysical and molecular-mobility measurements via spin-probe ESR spectroscopy has been applied to films and fibrous matrixes based on poly(3-hydroxybutyrate). The dynamic behaviors of partially crystalline samples during deformation under conditions of electrospinning and cold rolling have been compared. The comparative results of the complex investigation of films and ultrathin fibers in the poly(3-hydro-xybutyrate) matrix have shown that the electromechanical action leads to additional crystallization of the crystalline regions, spherulites, and lamellas in the polymer. The changes in the crystalline phase of the polymer are accompanied by an increase in the packing density of macromolecules in the intercrystalline space. With the use of the spin-probe ESR method, the effect of water and the oxidant ozone on the morphology of the amorphous phase of poly(3-hydroxybutyrate) ultrathin fibers has been determined. The measurements of the dynamics of spin-probe rotation in samples before and after cold rolling have shown that the additional orientation of poly(3-hydroxybutyrate) spherulites in a mechanical field results in stabilization of amorphous regions more resistant to the aggressive effects of ozone.
Key words: poly(3-hydroxybutyrate), structural and dynamic analysis, films, ultrathin fibers, polymer.
Ultrathin Poly(3-hydroxybutyrate) Fibers: Structure and Dynamic Characteristics is licensed under a Creative Commons Attribution 4.0 International License.
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