Improving the electrical conductivity of a carbon nanotube/polypropylene composite by vibration during injection-moulding

Yang, Liangbo; Liu, Fanghui; Xia, Hesheng; Qian, Xinyuan; Shen, Kaizhi; Zhang, Jie

doi:10.1016/j.carbon.2011.03.054

Cited by 50 publications

(27 citation statements)

References 28 publications

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“…Carbon nanotubes characterized by a unique structure and uncommon properties have already reached an important position in science and technology. High aspect ratio causes the boost of electrical and thermal conductivity of insulating polymers at relatively low loads . Likewise, the shape and properties of MWCNT allow for the improvement of mechanical properties of the polymer matrix when homogeneous dispersion is achieved.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of extruded nanocomposite based on polycarbonate/butadiene‐acrylonitrile‐styrene blend filled with multiwalled carbon nanotubes

Wegrzyn

Benedito

Giménez

2013

J of Applied Polymer Sci

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Nanocomposites of polycarbonate/acrylonitrile‐butadiene‐styrene (PC/ABS) with multiwall carbon nanotubes (MWCNT) prepared by masterbatch dilution are investigated in this work. Melt compounding with twin screw extruder is followed by complete characterization of morphology, rheological‐, mechanical‐, and thermal‐properties of the nanocomposites. Light‐transmission‐ and scanning electron microscopy shows the preferential location of MWCNT in the PC. Nevertheless, relatively good dispersion in the whole matrix is achieved, what is corroborated with the specific mechanical energy. The study of viscoelastic properties of PC/ABS‐MWCNT shows the fluid–solid transition below 0.5 wt % MWCNT. Beyond this point the continuous nanofiller network is formed in the matrix promoting the reinforcement. Addition of 0.5 wt % MWCNT reduces ductility of PC/ABS and enhances Young's modulus by about 30% and yield stress by about 20%. Moreover, theoretical values of stiffness calculated within this work agree with the experimental data. Electrical conductivity, showing percolation at 2.0 wt % MWCNT, are influenced by processing temperature. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40271.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of extruded nanocomposite based on polycarbonate/butadiene‐acrylonitrile‐styrene blend filled with multiwalled carbon nanotubes

Wegrzyn

Benedito

Giménez

2013

J of Applied Polymer Sci

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“…The nanocomposites reached a percolation threshold within CNT concentrations of 2-5 wt.%; however, the mechanical properties of the host polymers were affected. In order to improve the electrical conductivity of a CNT/PP composite, Yang et al also suggested applying vibration during the injectionmoulding 7 . Results showed that electrical conductivity of samples prepared by vibration injection moulding was far higher than the case of samples prepared by conventional injection moulding.…”

Section: Introductionmentioning

confidence: 99%

Compression Moulding of Thermoplastic Nanocomposites Filled with MWCNT

Quadrini

Bellisario

Santo

et al. 2017

Polymers and Polymer Composites

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SUMMARYMulti-walled carbon-nanotubes (MWCNTs) were melt-mixed with three different thermoplastic matrices (polypropylene, PP, polycarbonate, PC, and thermoplastic polyurethane, TPU) to produce nanocomposites with three different filler contents (1, 3, and 5 wt.%). Initial nanocomposite blends (in the shape of pellets) were tested under differential scanning calorimetry to evaluate the effect of the melt mixing stage. Nanocomposite samples were produced by compression moulding in a laboratory-scale system, and were tested with quasi-static (bending, indentation), and dynamic mechanical tests as well as with friction tests. The results showed the effect of the filler content on the mechanical and functional properties of the nanocomposites. Compression moulding appeared to be a valuable solution to manufacture thermoplastic nanocomposites when injection moulding leads to loss of performance. MWCNT-filled thermoplastics could be used also for structural and functional uses despite, the present predominance of electrical applications.

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“…Such materials lack strength, and the inclusion of fiber into the plastic can greatly improve its strength [4]. The orientation of the fibers in the plastic during injection molding creates an anisotropic material, and thus, there can be a significant effect on the performance of an antenna [5]. Using a straight, centre-fed dipole printed on a thin anisotropic substrate, the change in the resonant frequency was used to indicate the variation in the effective length of the dipole and so the effective permittivity was deduced.…”

Section: Introductionmentioning

confidence: 99%

Printed dipole antennas on substrates reinforced with unidirectional conducting fiber

Thiel

Kanesan

2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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Fiber reinforced composites offer strength and light weight but are electrically anisotropic. The resonant frequency of dipole antennas is orientation dependent. While FEM modeling showed a cosine relationship between the effective permittivity and angle, experimental measurements at UHF on cardboard reinforced with fine copper wire did not fit this relationship. The electromagnetic anisotropy has implications for radio communications systems located on UAVs and other platforms. Carbon nanotubes in polymeric composites provide a renewable option for high strength materials.I.

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Improving the electrical conductivity of a carbon nanotube/polypropylene composite by vibration during injection-moulding

Cited by 50 publications

References 28 publications

Preparation and characterization of extruded nanocomposite based on polycarbonate/butadiene‐acrylonitrile‐styrene blend filled with multiwalled carbon nanotubes

Preparation and characterization of extruded nanocomposite based on polycarbonate/butadiene‐acrylonitrile‐styrene blend filled with multiwalled carbon nanotubes

Compression Moulding of Thermoplastic Nanocomposites Filled with MWCNT

Printed dipole antennas on substrates reinforced with unidirectional conducting fiber

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