Academic Journal
Effect of fire retardant fillers on thermophysical properties of composite materials of ethylene-vinyl acetate copolymer
| Τίτλος: | Effect of fire retardant fillers on thermophysical properties of composite materials of ethylene-vinyl acetate copolymer |
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| Συγγραφείς: | Chulieieva, Olena |
| Πηγή: | Eastern-European Journal of Enterprise Technologies; Том 6, № 12 (90) (2017): Матеріалознавство; 58-67 Eastern-European Journal of Enterprise Technologies; Том 6, № 12 (90) (2017): Материаловедение; 58-67 Eastern-European Journal of Enterprise Technologies; Том 6, № 12 (90) (2017): Materials Science; 58-67 |
| Στοιχεία εκδότη: | Private Company Technology Center, 2017. |
| Έτος έκδοσης: | 2017 |
| Θεματικοί όροι: | композиційні матеріали, вогнестійкість, кополімер етилену з вінілацетатом, наповнювачі-антипірени, теплофізичні властивості, 13. Climate action, 0211 other engineering and technologies, 0202 electrical engineering, electronic engineering, information engineering, композиционные материалы, огнестойкость, сополимер этилена с винилацетатом, наполнители-антипирены, теплофизические свойства, composite materials, fire resistance, ethylene-vinyl acetate copolymer, fire retardant fillers, thermophysical properties, 02 engineering and technology, 0204 chemical engineering, 0210 nano-technology, 7. Clean energy, UDC 679.7:678:544, 3. Good health |
| Περιγραφή: | The influence of composite materials of ethylene-vinyl acetate copolymer that do not maintain combustion and fire-retardant fillers on thermophysical processes was explored. Ethylene-vinyl acetate copolymer was used in the studies. The content of vinyl acetate is 18 % and 28 %; MFI is 2.5 g/10 min. and MFI is 5 g/10 min. Fire retardant fillers included aluminum oxide trihydrates with average diameter of particles of 1.5 µm and 3.0 µm; magnesium oxide dihydrates with average diameter of particles of 3.0 µm and 3.7 µm and hydromagnesite with average diameter of particles of 1.4 µm. Using the method of thermogravimetric analysis and differential scanning calorimetry TGA/DSC, temperatures of vitrification, melting and decomposition, crystallinity degree, specific thermal capacity, and activation energy were determined. It was found that temperatures of physical transformations (temperatures of vitrification, melting, and decomposition) of polymer compositions that do not maintain combustion depend on properties of ethylene-vinyl acetate copolymer. They increase with decreasing of fluidity indicator of copolymer of ethylene vinyl acetate. EVA 1 has lower values of the indicator of melt fluidity and content of vinyl acetate than EVA 2. During an increase in content of fire retardant fillers, temperatures of physical transformations are shifted in the direction of increasing: vitrification temperature increases from – 85 °C to 53 °C, melting temperature – from 68 °C to 90 °C. At the same time, crystallinity degree decreases from 8.8 % to 1.0 % and specific thermal capacity increases from 0.4 to 8.6 J/gK. This is due to formation of supermolecular structure of the derived compositions. The influence of the polymeric matrix, composition and dispersity of fire retardant fillers on thermal-physical characteristics of polymeric compositions was determined. In case of using a polymer matrix with lower MFI and fire retardants fillers with smaller average diameter of particles, temperature characteristics are shifted towards higher temperatures than in the case of selection of polymer matrix with large MFI and fire-retardant fillers with a larger diameter of particles. Obtained results will be useful during development of formulations of polymer compositions that do not maintain combustion for cable products, considering their thermophysical characteristics. |
| Τύπος εγγράφου: | Article |
| Περιγραφή αρχείου: | application/pdf |
| ISSN: | 1729-4061 1729-3774 |
| DOI: | 10.15587/1729-4061.2017.119494 |
| Σύνδεσμος πρόσβασης: | http://journals.uran.ua/eejet/article/download/119494/115101 http://journals.uran.ua/eejet/article/view/108187 http://journals.uran.ua/eejet/article/download/108187/103988 http://journals.uran.ua/eejet/article/view/119494 |
| Rights: | CC BY |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....5d66a823bbe8e4094181c2b0e28515b7 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 17294061 17293774 |
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| DOI: | 10.15587/1729-4061.2017.119494 |