Rheology and properties of melt-processed poly(ether ether ketone)/multi-wall carbon nanotube composites

Bangarusampath, D. S.; Ruckdäschel, Holger; Altstädt, Volker; Sandler, Jan K.W.; Garray, Didier; Shaffer, Milo S. P.

doi:10.1016/j.polymer.2009.09.061

Cited by 146 publications

(95 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar modulus behaviour, which is typical of a strong gel [22], has been reported for other CNT suspension [21,22,27]. In the case of SG6_3 suspensions, G′′ always dominates G′ (Figure 6b) indicating that these suspensions exhibit only viscous behaviour even at a CNT loading of 1.65 wt.…”

Section: Dynamic Shear Propertiessupporting

confidence: 80%

Low viscosity processing using hybrid CNT-coated silica particles to form electrically conductive epoxy resin composites

Wilkinson¹,

Kinloch²,

Othman

2016

Polymer

View full text Add to dashboard Cite

Hybrid particles of multiwall carbon nanotubes (CNTs) grafted onto silica gel were shown to provide a low viscosity processing route to forming electrically-conductive epoxy resin composites. Rheological studies showed the viscoelastic shear moduli of epoxy resin suspensions containing these particles (named SG6_3) remained within the same order of magnitude as that of the neat resin at ≤5 wt.% loading (containing up to 1.65 wt.% of grafted CNTs). Whereas, the addition of 1.65 wt.% of discrete (nongrafted) CNTs into the same resin increased shear moduli by up to seven orders of magnitude. The complex viscosities of suspensions containing ≤5 wt.% of SG6_3 remained essentially unchanged, whereas an increase of up to five orders of magnitude resulted upon the addition of 1.65 wt.% of nongrafted CNTs. Whilst rheological studies showed SG6_3 did not form a percolated network at levels ≤5 wt.%, addition of only 2 wt.% (containing 0.66 wt.% CNT) was found to form an electrically-conductive percolated network in an epoxy resin composite with conductivity ~ 10 -4 S/m.

show abstract

Section: Dynamic Shear Propertiessupporting

confidence: 80%

Low viscosity processing using hybrid CNT-coated silica particles to form electrically conductive epoxy resin composites

Wilkinson¹,

Kinloch²,

Othman

2016

Polymer

View full text Add to dashboard Cite

show abstract

“…DIC micrographs of polished sections appeared smooth at low CNT loadings (Figure 5a) while at the highest loading ( Figure 5b) the microstructure appeared textured, with features on the scale of 50 -100 μm, akin to that of the larger particles from the powder particle size distribution. It seems that the 13.6 vol% CNT NC particles were not fully consolidated even at high pressures, presumably due to the high viscoelasticity of heavily CNT loaded polymers [4]. Some of the resin was pushed out of CNT rich regions locally to fill gaps between powder particles (Figure 5c), but the highly viscoelastic resin could not effectively migrate to fill areas with larger gaps, giving rise to localised voids.…”

Section: Nanocomposite Production and Compositionmentioning

confidence: 99%

“…Large CNT loadings have been relatively easily achieved in thermoplastics by shear mixing [3,4], as they benefit from broad processing windows. For thermosets, traditional dispersion techniques such as simple stirring and sonication have produced good quality NCs for low CNT loadings, but have been ineffective at CNT volume fractions beyond a few percent [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermosetting hierarchical composites with high carbon nanotube loadings: En route to high performance

Herceg

Abidin

Greenhalgh

et al. 2016

Composites Science and Technology

Self Cite

View full text Add to dashboard Cite

“…Baixos valores no limite de percolação elétrica podem ocorrer devido a estruturas cineticamente estáveis que são formadas pela boa dispersão do reforço, ao passo que, altos índices de percolação estão associados ao elevado grau de alinhamento das nanopartículas, ou pelo revestimento polimérico sobre os CNTs, limitando o contato entre os tubos. Além disso, o aumento da concentração dos CNTs na matriz polimérica durante a sua fusão provoca um grande aumento na viscosidade do sistema, afetando o processo de dispersão das nanopartículas, e consequentemente, elevando o limite de percolação elétrica [14,15] . A razão de aspecto dos CNTs é outro fator que influencia diretamente nas propriedades elétricas do compósito obtido.…”

Section: Estudo Das Propriedades Elétricas E Térmicas De Compósitos Nunclassified

Estudo das propriedades elétricas e térmicas de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçados com nanotubos de carbono

2015

View full text Add to dashboard Cite

ResumoNeste trabalho o comportamento de cristalização e a condutividade elétrica de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçado com nanotubos de carbono de paredes múltiplas obtidos através da técnica de mistura em fusão foram estudados. A incorporação do nanoreforço na matriz polimérica foi responsável por um aumento da cristalinidade devido ao fenômeno de nucleação heterogênea. A condutividade elétrica do PPS apresentou um aumento de 11 ordens de magnitude quando 2,0 m/m% de MWCNT foram adicionados a matriz polimérica. Além disso, o limite de percolação elétrica encontrado para este sistema foi de 1,4 m/m% de MWCNT, revelando a formação de uma rede condutiva tridimensional no interior da matriz polimérica. Palavras-chave: PPS, MWCNT, cristalização, propriedades elétricas, limite de percolação elétrica. AbstractIn this work, the crystallization behavior and electrical conductivity of multiwalled carbon nanotubes reinforced poly (phenylene sulfide) nanostructured composites obtained by melt mixing were investigated. The incorporation of nanofiller in polymeric matrix was responsible for an increase in crystallinity due heterogeneous nucleation phenomenon. The electrical conductivity of PPS showed an increase by 11 orders of magnitude when 2.0 wt% of MWCNT was considered. Moreover, the electrical percolation threshold found on this system was 1.4 wt%, suggesting the formation of three-dimensional conductive network within the polymeric matrix.

show abstract

Rheology and properties of melt-processed poly(ether ether ketone)/multi-wall carbon nanotube composites

Cited by 146 publications

References 40 publications

Low viscosity processing using hybrid CNT-coated silica particles to form electrically conductive epoxy resin composites

Low viscosity processing using hybrid CNT-coated silica particles to form electrically conductive epoxy resin composites

Thermosetting hierarchical composites with high carbon nanotube loadings: En route to high performance

Estudo das propriedades elétricas e térmicas de compósitos nanoestruturados de poli(sulfeto de fenileno) reforçados com nanotubos de carbono

Contact Info

Product

Resources

About