| Autor: |
T. Bezrodna, L. Kosyanchuk, N. Babkina, O. Antonenko, V. Bezrodnyi, A. Negriyko |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Results in Optics, Vol 12, Iss , Pp 100451- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2666-9501 |
| DOI: |
10.1016/j.rio.2023.100451 |
| Popis: |
Photooxidation processes during irradiation of the aerosil-filled polyurethane films, based on oligooxypropylene glycol, toluene diisocyanate and trimethylolpropane, for a use as the active media of solid-state lasers were investigated by means of the IR-spectroscopy and dynamic mechanical analysis (DMA) methods, depending on the inorganic dopant concentration (5 and 7 wt%). The IR-spectroscopic experiments showed that the introduction of aerosil slowed down these processes. Data from dynamic mechanical studies indicated that irradiation of aerosil-filled polyurethane matrices caused an increase in its structural heterogeneity and a drop of the elastic modulus. During irradiation of the polyurethane material with 7 wt% of aerosil, a partial destruction of the nanofiller spatial network was possible due to dispersion of the irradiation energy by the nanoparticles. The obtained results demonstrated a positive effect of the aerosil nanofiller on the polyurethane material stability under irradiation with an ultra-high pressure mercury lamp. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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