The mechanical properties of solid (crystalline) polymer materials are proposed to be investigated simultaneously using two complementary methods based on controlled indentation of a spherical indenter. The first method consists in the direct analysis of the load curve without using the concept of contact stiffness; the second method is based on measurements of the size of prints depending on the magnitude of the static load. The study shows that the reinforcement of a solid polymer with carbon fibers can lead to a significant increase in its elastic-strength properties.
The IR laser-induced radiation of carbon materials is experimentally investigated. The broadband spectra of radiation in the visible region, as well as the redshift of the spectra of dispersed carbon materials relative to the spectra of bulk polycrystalline graphite, have been found. All measured spectra are typical for incoherent dipole radiation. Broadband radiation is qualitatively explained by Raman scattering of photons.
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