Keyword: «raman spectroscopy»

This article deals with the development of a mock-up of a thermal shock equipment and the study of the properties of carbon nanomaterials obtained from plastic waste. The thermal shock equipment was assembled on the basis of a capacitor battery, which produced powders from polypropylene by the method of fast Joule heating. The powders were investigated by the following techniques: Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy and UV microscopy. The electrical properties of the obtained samples were measured by the dual-probe method. The post-processing results showed the C/O atom ratio as 10:1. Spectrum of Raman spectroscopy and UV microscopy shown that peaks characteristic of graphite/graphene-like materials. The electrical properties show that there is a tendency to decrease the resistance by 2 orders of magnitude after thermal shock.

The article presents the results of a study of polyethylene samples exposed to natural climatic factors for 18 months by Raman spectroscopy. The spectra were obtained at different depths from the sample surface and it was shown that the stages of material degradation depending on the depth have different degrees. An estimate of the degree of degradation from depth is given, according to which the material undergoes structural changes most intensively at a distance of up to 40 µm from the surface. At depths greater 80–100 µm, structural changes in the material are not detected.