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The subject of this research is the production process of polyvinyl chloride (PVC) regranulate using a plasticizer synthesized from recycled poly(ethylene terephthalate) (PET). In this way, a plasticizer was synthesized that does not pose a risk to human health and the environment in accordance with the principles of chemical leasing and green chemistry. The obtained plasticizer was characterized using elemental analysis, FTIR, and NMR spectroscopy and determination of hydroxyl and acid number. The mechanical properties of materials obtained on the basis of recycled PVC and plasticizers from PET were tested according to standard methods.

The carbothermal reduction processing of partially mineralized fir (Abies alba) samples was used to obtain highly-porous SiC ceramics with cellular structure. The infiltration of TEOS (tetraetilortosilikat, Si(OC2H5)4) as a silica source, was conducted in order to carry out the mineralization process. Synthesis of the SiC was achieved with a C/SiO2 replica annealing at 1723 K in Ar atmosphere. The obtained samples were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The experimental results revealed that the hierarchical bimorphous wood structure was preserved even after high-temperature treatment. Microstructural characterization of the ceramics revealed the presence of the P-SiC phase and traces of the a-SiC phase.