Effect of Ozone and Ultraviolet Radiation on Structure of Fibrous Materials Based on Poly(3-hydroxybutyrate) and Polylactide
| Autor: | A. L. Iordanskii, P. M. Tyubaeva, Svetlana Karpova, A. L. Zhulkina, A. A. Ol’khov, Yu. N. Zernova |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science technology industry and agriculture General Engineering macromolecular substances 02 engineering and technology Polymer 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences Electrospinning Amorphous solid Polyester Differential scanning calorimetry chemistry Chemical engineering Polymer ratio 0103 physical sciences medicine lipids (amino acids peptides and proteins) General Materials Science Fiber 0210 nano-technology Ultraviolet |
| Zdroj: | Inorganic Materials: Applied Research. 11:1130-1136 |
| ISSN: | 2075-115X 2075-1133 |
| DOI: | 10.1134/s2075113320050251 |
| Popis: | The ultrafine fibers based on mixtures of biodegradable polyesters (poly(3-hydroxybutyrate) (PHB) and polylactide (PLA)) are produced via electrospinning. The dependence of the mixed fiber structure on composition is shown by optical microscopy. Using the probe technique of electron paramagnetic resonance (EPR) and differential scanning calorimetry (DSC) methods, the structure of the crystalline and amorphous regions of the fibers is analyzed. The introduction of 10–70% of PHB into the PLA matrix leads to a sharp increase in molecular mobility, but the radical concentration in the amorphous regions decreases dramatically. The increase in the PHB concentration in the mixture over 70% results in a decrease in molecular mobility. Studies on the polymer matrix state for the first time allow one to interpret at the supramolecular level the effects of ozone and ultraviolet (UV) radiation on the structural and dynamic characteristics of PHB/PLA fibers. It is shown that the correlation time of the radical in mixtures is minimal and does not depend on the polymer ratio in the fiber and the time of exposure to ozone and UV radiation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink