Identifying the influence of the polymer matrix type on the structure formation of microcomposites when they are filled with copper particles
| Autor: | Alexander Parkhomenko, Natalia Zhuravskaya, Vladimir Korzhik, Natalia Meranova, Natalia Fialko, Viktor Prokopov, Yuliy Sherenkovskiy, Neli Koseva, Roman Dinzhos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
polyethylene
Materials science polymer composites 020209 energy Composite number 0211 other engineering and technologies Nucleation mechanisms of structure formation Energy Engineering and Power Technology 02 engineering and technology Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound Condensed Matter::Materials Science law Management of Technology and Innovation 021105 building & construction lcsh:Technology (General) 0202 electrical engineering electronic engineering information engineering lcsh:Industry copper microparticles Electrical and Electronic Engineering Crystallization Polycarbonate Composite material Polypropylene chemistry.chemical_classification Applied Mathematics Mechanical Engineering Polymer Polyethylene Computer Science Applications chemistry polycarbonate Control and Systems Engineering visual_art visual_art.visual_art_medium lcsh:T1-995 lcsh:HD2321-4730.9 Mass fraction polypropylene |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 5, Iss 6 (107), Pp 49-57 (2020) |
| ISSN: | 1729-4061 1729-3774 |
| Popis: | Studies were carried out to establish the mechanisms of structure formation during crystallization of polymer composites based on polyethylene, polypropylene or polycarbonate filled with copper microparticles. The researches were executed using a technique, the first stage of which consisted in the experimental determination of crystallization exotherms of composites, and the second – in the theoretical analysis based on the obtained exotherms of the structure formation characteristics. A complex of studies on determination of crystallization exotherms for investigated microcomposites was carried out. The regularities of the cooling rate influence of composites, the method of their production and the mass fraction of filler on the temperature level of the beginning and ending of crystallization, the maximum value of the reduced heat flux, etc. were established. It is shown that for the applied methods of obtaining composites the increase of their cooling rate causes the decrease of the indicated temperatures and heat flux. It is established that the value of the mass fraction of the filler has a less significant effect on the characteristics of the crystallization process. The regularities of structure formation of polymer composites at the initial stage of crystallization with the involvement of data on crystallization exotherms and nucleation equations are investigated. The presence of planar and three-dimensional mechanisms of structure formation at this stage has been established. It is shown that the ratio of these mechanisms is influenced by the type of polymer matrix and the method of obtaining composites. For the second stage of crystallization, which occurs in the entire volume of the composite, the results of experiments on crystallization exotherms were analyzed on the basis of the Kolmogorov-Avrami equation. It is shown that the structure formation of polyethylene-based composites occurs by the three-dimensional mechanism, and on the basis of polypropylene and polycarbonate – by the mechanism of the stressed matrix |
| Databáze: | OpenAIRE |
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