Characteristics of the Parameters of Superfine Fibers of Poly(3-hydroxybutyrate) Modified with Tetraphenylporphyrin

Structural-dynamic studies combining X-ray diffraction analysis, thermophysical measurements (DSC), X-ray diffraction analysis, probe EPR method, and scanning electron microscopy are performed. The structural and dynamic characteristics of electrospun superfine fibers based on poly-(3-hydroxybutyrat...

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Bibliographic Details
Published in:Inorganic materials : applied research 2021, Vol.12 (1), p.44-54
Main Authors: Karpova, S. G., Olkhov, A. A., Popov, A. A., Iordanskii, A. L., Shilkina, N. G.
Format: Article
Language:English
Subjects:
Aqueous solutions
Chain mobility
Chemistry
Chemistry and Materials Science
Crystal structure
Crystallinity
Dynamic characteristics
Enthalpy
Fibers
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Molecular chains
Morphology
Parameter modification
Polyhydroxybutyrate
Ultrafines
X-ray diffraction
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Summary:Structural-dynamic studies combining X-ray diffraction analysis, thermophysical measurements (DSC), X-ray diffraction analysis, probe EPR method, and scanning electron microscopy are performed. The structural and dynamic characteristics of electrospun superfine fibers based on poly-(3-hydroxybutyrate) (PHB) containing a low concentration of the tetraphenylporphyrin complex (TPP) (0–5%) are considered. It is shown that the addition of tetramethylporphyrin complexes to PHB fibers changes the morphology, a slight decrease in crystallinity is observed, and the molecular mobility in the amorphous regions of the polymer slows down. The temperature action on the fibers (annealing at 140°C) leads to a sharp increase in crystallinity and molecular mobility in the amorphous regions of poly(3-hydroxybutyrate)—TPP fibers. Exposure to an aqueous medium at 70°C is accompanied by a sharp decrease in the enthalpy of melting and an increase in the molecular mobility of chains in the amorphous regions of the fiber.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113321010184