A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties
In this work, polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites were prepared by simple melt mixing at a temperature (~350°C) well above the processing temperature of PC, followed by compression molding, that exhibited percolation threshold as low as of 0.11 wt% and high electrical...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology
2013-06-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0004277&mi=cd |
| _version_ | 1828530494071898112 |
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| author | B. B. Khatua S. Maiti N. K. Shrivastava S. Suin |
| author_facet | B. B. Khatua S. Maiti N. K. Shrivastava S. Suin |
| author_sort | B. B. Khatua |
| collection | DOAJ |
| description | In this work, polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites were prepared by simple melt mixing at a temperature (~350°C) well above the processing temperature of PC, followed by compression molding, that exhibited percolation threshold as low as of 0.11 wt% and high electrical conductivity of 1.38x10–3 S•cm–1 at only 0.5 wt% MWCNT loading. Due to the lower interfacial energy between MWCNT and PC, the carbon nanotubes are excellently dispersed and formed continuous conductive network structure throughout the host polymer. AC electrical conductivity and dielectric permittivity of PC/MWCNT nanocomposites were characterized in a broad frequency range, 101–107 Hz. Low percolation threshold (pc) of 0.11 wt% and the critical exponent (t) of ~3.38 was resulted from scaling law equation. The linear plot of logσDC vs. p–1/3 supported the presence of tunneling conduction among MWCNTs. The thermal property and storage modulus of PC were increased with the incorporation of little amount of MWCNTs. Transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) confirmed the homogeneous dispersion and distribution of MWCNTs throughout the matrix phase. |
| first_indexed | 2024-12-11T22:23:58Z |
| format | Article |
| id | doaj.art-2b159f2c5f90461daf6d170bb3281801 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-11T22:23:58Z |
| publishDate | 2013-06-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-2b159f2c5f90461daf6d170bb32818012022-12-22T00:48:21ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2013-06-017650551810.3144/expresspolymlett.2013.47A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical propertiesB. B. KhatuaS. MaitiN. K. ShrivastavaS. SuinIn this work, polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites were prepared by simple melt mixing at a temperature (~350°C) well above the processing temperature of PC, followed by compression molding, that exhibited percolation threshold as low as of 0.11 wt% and high electrical conductivity of 1.38x10–3 S•cm–1 at only 0.5 wt% MWCNT loading. Due to the lower interfacial energy between MWCNT and PC, the carbon nanotubes are excellently dispersed and formed continuous conductive network structure throughout the host polymer. AC electrical conductivity and dielectric permittivity of PC/MWCNT nanocomposites were characterized in a broad frequency range, 101–107 Hz. Low percolation threshold (pc) of 0.11 wt% and the critical exponent (t) of ~3.38 was resulted from scaling law equation. The linear plot of logσDC vs. p–1/3 supported the presence of tunneling conduction among MWCNTs. The thermal property and storage modulus of PC were increased with the incorporation of little amount of MWCNTs. Transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) confirmed the homogeneous dispersion and distribution of MWCNTs throughout the matrix phase.http://www.expresspolymlett.com/letolt.php?file=EPL-0004277&mi=cdNanocompositesElectrical ConductivityThermal PropertiesPC |
| spellingShingle | B. B. Khatua S. Maiti N. K. Shrivastava S. Suin A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties eXPRESS Polymer Letters Nanocomposites Electrical Conductivity Thermal Properties PC |
| title | A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties |
| title_full | A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties |
| title_fullStr | A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties |
| title_full_unstemmed | A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties |
| title_short | A strategy for achieving low percolation and high electrical conductivity in melt-blended polycarbonate (PC)/multiwall carbon nanotube (MWCNT) nanocomposites: Electrical and thermo-mechanical properties |
| title_sort | strategy for achieving low percolation and high electrical conductivity in melt blended polycarbonate pc multiwall carbon nanotube mwcnt nanocomposites electrical and thermo mechanical properties |
| topic | Nanocomposites Electrical Conductivity Thermal Properties PC |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0004277&mi=cd |
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