Rheological behavior of multiwalled carbon nanotube/polycarbonate composites

Pötschke, Petra; Fornes, T. D.; Paul, Donald R

doi:10.1016/s0032-3861(02)00151-9

Cited by 1,205 publications

(850 citation statements)

References 32 publications

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“…[22][23] These results correspond to our obtained results. In addition, some researchers have reported that the plateau modulus G¢ in the low-o region reflected the properties of the fiber network structure.…”

Section: Effect Of Pc Matrix Viscosity J Nithikarnjanatharn Et Alsupporting

confidence: 92%

“…The elastic component of the polymer can be increased by adding rigid particles, [1][2][3][4] and it is well known that the elasticity of fiber suspensions (for example, PC/multiwall CNT composites 22 or aqueous multi-walled CNT dilute suspensions 23 ) drastically increases with their concentration. [22][23] These results correspond to our obtained results.…”

Section: Effect Of Pc Matrix Viscosity J Nithikarnjanatharn Et Almentioning

confidence: 99%

“…For example, Potschke et al 22 investigated the rheological properties of PC/CNT composites. The increase in viscosity associated with the addition of CNTs was much higher than that of carbon black.…”

Section: Introductionmentioning

confidence: 99%

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The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

Nithikarnjanatharn

Ueda

Tanoue

et al. 2012

Polym J

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The effect of polycarbonate (PC) matrix viscosity on the thermal conductivity of a PC/vapor-grown carbon fiber (VGCF) composite was investigated in this study in terms of the rheological properties of the PC/VGCF using two types of VGCF. Two types of VGCF, which have different aspect ratios (VGCF-h has an aspect ratio of 40, whereas VGCF-s has an aspect ratio of 100), were added to two types of PC with different viscosities. The storage modulus (G¢) and loss modulus (G 00 ) of the PC slightly increased and thermal conductivity gradually increased with the content of VGCF-h. By adding VGCF-s to low-viscosity PC, rheological properties originating in the network structure were observed. Thermal conductivity of low-viscosity PC drastically increased with the content of VGCF-s. By analyzing the length of VGCF in each composite, we found that the length of VGCF decreased with mixing. It was also easy to shorten VGCF in high-viscosity PC. We clarified that the thermal conductivity of PC/VGCF could be controlled with the viscosity of the polymer matrix because the spread of the network structure of VGCF and/or the breaking of VGCF depended on the viscosity of the polymer matrix.

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Section: Effect Of Pc Matrix Viscosity J Nithikarnjanatharn Et Alsupporting

confidence: 92%

Section: Effect Of Pc Matrix Viscosity J Nithikarnjanatharn Et Almentioning

confidence: 99%

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The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

Nithikarnjanatharn

Ueda

Tanoue

et al. 2012

Polym J

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“…This non terminal behaviour can be attributed to the formation of an interconnected nanotube network in the polymer (so-called percolation threshold). Therefore, the solid-like (or pseudo-solid-like) behavior can be attributed to the existence of frictional interactions between the highly anisotropic particles [27,28]. When 2 wt% of PP-g-MA is added to PP/MWNT nanocomposites, storage modulus of the composites was further increased.…”

Section: Rheological Characterizationmentioning

confidence: 99%

Multi-walled carbon nanotube filled polypropylene nanocomposites based on masterbatch route: Improvement of dispersion and mechanical properties through PP-g-MA addition

Prashantha¹,

Soulestin²,

Lacrampe³

et al. 2008

Express Polym. Lett.

191

137

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Abstract. Multi-wall carbon nanotubes (MWNTs) filled polypropylene (PP) nanocomposites were prepared through diluting a PP/MWNT masterbatch in a PP matrix by melt compounding with a twin screw extruder. Polypropylene grafted maleic anhydride (PP-g-MA) was used to promote the carbon nanotubes dispersion. The effect of PP-g-MA addition on the rheological, mechanical and morphological properties of the nanocomposites was assessed for different MWNTs loadings. Scanning electron microscopy (SEM) has shown that nanotubes are distributed reasonably uniformly. A better dispersion and good adhesion between the nanotubes and the PP matrix is caused by wrapping of PP-g-MA on MWNTs. When PP-g-MA is added, dynamic moduli and viscosity further increases compared to PP/MWNT nanocomposites. The rheological percolation threshold drops significantly. Tensile and flexural moduli and Charpy impact resistance of the nanocomposites also increases by the addition of PP-g-MA. The present study confirms that PP-g-MA is efficient to promote the dispersion of MWNTs in PP matrix and serves as an adhesive to increase their interfacial strength, hence greatly improving the rheological percolation threshold and mechanical properties of PP/MWNT nanocomposites.

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“…Using only 0.5% CNT reinforcement, the elastic modulus was improved about 40% over that of the matrix and the tensile strength was improved about 25%. Pötschke et al (2002) investigated the electrical and rheological behaviors of polycarbonate composites reinforced by multi-walled carbon nanotubes (MWCNT). They found a rapid change in the electrical resistivity and complex viscosity at about 2% volume fraction of CNTs due to the electrical and rheological percolation associated with interactions of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Analysis of Fracture of Carbon Nanotubes Embedded in Composites

et al. 2005

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Abstract. Due to the enormous difference in the scales involved in correlating the macroscopic properties with the micro-and nano-physical mechanisms of carbon nanotube-reinforced composites, multiscale mechanics analysis is of considerable interest. A hybrid atomistic/continuum mechanics method is established in the present paper to study the deformation and fracture behaviors of carbon nanotubes (CNTs) in composites. The unit cell containing a CNT embedded in a matrix is divided in three regions, which are simulated by the atomic-potential method, the continuum method based on the modified Cauchy-Born rule, and the classical continuum mechanics, respectively. The effect of CNT interaction is taken into account via the Mori-Tanaka effective field method of micromechanics. This method not only can predict the formation of Stone-Wales (5-7-7-5) defects, but also simulate the subsequent deformation and fracture process of CNTs. It is found that the critical strain of defect nucleation in a CNT is sensitive to its chiral angle but not to its diameter. The critical strain of Stone-Wales defect formation of zigzag CNTs is nearly twice that of armchair CNTs. Due to the constraint effect of matrix, the CNTs embedded in a composite are easier to fracture in comparison with those not embedded. With the increase in the Young's modulus of the matrix, the critical breaking strain of CNTs decreases.

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Rheological behavior of multiwalled carbon nanotube/polycarbonate composites

Cited by 1,205 publications

References 32 publications

The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

The rheological behavior and thermal conductivity of melt-compounded polycarbonate/vapor-grown carbon fiber composites

Multi-walled carbon nanotube filled polypropylene nanocomposites based on masterbatch route: Improvement of dispersion and mechanical properties through PP-g-MA addition

Multiscale Analysis of Fracture of Carbon Nanotubes Embedded in Composites

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