International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The purpose of this study was to investigate the structure of recycled tires which are used in artificial turf/ grass as infi ll materials. One of the most important issues, especially in Albania is proving that these materials are recycled. In this paper it is presented the FTR with ATR system methods analyses. That will provide info regarding the combining material in rubber granules, for the investigation of their structure, it was used the spectroscopy method, with vibration infrared and Fourier FTIR transformation equipped with ATR system, a method which enables analysis of samples of thick surface, without any prior preparation. The scanning of samples was done with wavelength from 4000-400 cm-1. At the same time was possible to see the changes in the micro-structure of the tires by using the Differential scanning calorimetry (DSC) analyses.

The investigation of influence of modified conditions on formation of complex materials based on tetragonal zirconia doped by d-elements of I group (Cu or Ag) was carried out, in particular the routes of synthesis and type of dopant. The kinetic parameters of separated stage of NPs formation (drying of hydrogel under MW irradiation, dehydration and crystallization of amorphous zirconia NPs) were estimated. It was shown, the dehydration of tetragonal zirconia hydrogel in conditions of MW irradiation occurs due in two stage. In contrast for Cu (or Ag) –modified hydrogels only one stage dehydration is observed. The dehydration and crystallization of unmodified and modified xerogel is studied by DSC method. It was shown that the kinetic parameters of dehydration depend as from nature of zirconium salts that were using for synthesis and type of dopant. For crystallization processes the some parameters (crystallization temperature, enthalpy) are saved features of dependence on route of synthesis for unmodified and modified systems. However, the behaviour of dependence of activation energy on route of synthesis is contrast for unmodified and modified systems.