Ultrathin poly (3-hydroxybutyrate) fibers: structure and dynamic characteristics

Ultrathin poly (3-hydroxybutyrate) fibers: structure and dynamic characteristics

Автор: Karpova Svetlana Gennadyevna, Iordanskiy Aleksey Leonidovich, Motyakin Mikhail Viktorovich, Olkhov Anatoliy Aleksandrovich, Lomakin Sergey Modestovich, Berlin Aleksandr Aleksandrovich

Журнал: НБИ технологии @nbi-technologies

Рубрика: Технико-технологические инновации

Статья в выпуске: 2 (21), 2016 года.

Бесплатный доступ

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.

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Poly(3-hydroxybutyrate), structural and dynamic analysis, films, ultrathin fibers, polymer

Короткий адрес: https://sciup.org/14968425

IDR: 14968425   |   DOI: 10.15688/jvolsu10.2016.2.4

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