Influence of Carbon Nanotubes on Polyamide Properties
| Autor: | Z. Buhin Šturlić, N. Šorgo, S. Lučić Blagojević |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
electrical conductivity PA/MWCNT PA/MWCNT-COOH thermal properties thermal stability thermal conductivity mechanical properties Process Chemistry and Technology lcsh:TP155-156 General Chemistry Carbon nanotube Biochemistry law.invention PA/MWCNT PA/MWCNT-COOH thermal properties thermal stability thermal conductivity electrical conductivity mechanical properties Thermal conductivity Electrical resistivity and conductivity law Polyamide Thermal stability Composite material lcsh:Chemical engineering |
| Zdroj: | Chemical and Biochemical Engineering Quarterly, Vol 33, Iss 3, Pp 337-346 (2019) Chemical and Biochemical Engineering Quarterly Volume 33 Issue 3 |
| ISSN: | 1846-5153 0352-9568 |
| Popis: | In this study, the addition of carbon nanotubes (MWCNT) and modified carbon nanotubes (MWCNT-COOH) in the range of 0.5 wt. % to 5 wt. % in polyamide (PA) obtained as a residue upon 3D printing, was investigated. PA and nanocomposite samples were prepared by melt mixing. PA/MWCNT and PA/MWCNT-COOH nanocomposites were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), THB thermal conductivity determination method, electrochemical impedance spectroscopy (EIS), and tensile test. Results of DSC analysis showed that both types of carbon nanotubes (MWCNTs) acted as nucleation centres of PA matrix, but had no effect on the order of the crystalline structure. Due to the polar nature of the surface and better dispersion, MWCNT-COOH filler accelerated PA crystallization more significantly compared to MWCNT. Due to the presence of nanofiller, the PA chains had limited motion space, which interfered with the crystallization process of the matrix. The thermal stability of the PA matrix increased with the addition of both MWCNT and MWCNT-COOH fillers. Higher thermal conductivity was achieved with the addition of MWCNT-COOH filler compared to the addition of MWCNT. The results of the tensile test showed that with the addition of both types of MWCNT fillers in the PA matrix, the modulus of elasticity and yield stress had reduced, but the yield strain increased. Results of the EIS showed that MWCNT nanofiller had not changed the electrical conductivity regardless of modification. |
| Databáze: | OpenAIRE |
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