Abstract
Incorporating multi wall carbon nanotube (MWCNT) into the polymer can improve the electrical properties of the nanocomposites. The effects of MWCNT on the electrical and rheological properties of polypropylene/MWCNT (PP/MWCNT) nanocomposites are investigated. The nanocomposites were prepared using melt mixing technique at chamber temperature of 180°C and rotor rotation of 100 rpm for 10 minutes. Addition of MWCNT increases the electrical surface conductivity up to 10 −7 S. The electrical percolation threshold of the nanocomposites is found to occur at 1.3 wt% MWCNT content. Viscosity of the nanocomposites increased with the addition of MWCNT. The rheological percolation threshold of the PP/MWCNT is found occur at 1.4 wt% MWCNT content. Well dispersion is observed by mean Scanning Electron Microscope (SEM) analysis.
Highlights
Carbon nanotubes (CNT) is a material that widely studied since their discovery by Iijima [1]
The electrical percolation threshold of the PP/multi wall carbon nanotube (MWCNT) nanocomposites was calculated with a power law function [2,13,14]: ߪ = ߪ(φ − φ)ఉ
Where σ is the electrical conductivity of the nanocomposites, σ0 is a constant related to intrinsic conductivity, φ is the volume fraction of the filler, φc is a percolation threshold, and β is the critical exponent
Summary
Carbon nanotubes (CNT) is a material that widely studied since their discovery by Iijima [1]. This is because the advantage of CNT which has a high aspect ratio so that increases the mechanical strength of the composites [2,3]. Polymer is an insulator material because it has a low conductivity (>10-14 S). Dispersion of CNTs in a polymer matrix is one of the keys to improve electrical and mechanical properties of the nanocomposites. The effect of MWCNT addition in nanocomposite PP/MWCNT in order to improve electrical and rheological properties with PP-g-MA compatibilizer produced by melt mixing technique is studied and investigated. The results are analyzed using insulation tester, rotational rheometer, and SEM
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