Influences of polymer matrix melt viscosity and molecular weight on MWCNT agglomerate dispersion

Kasaliwal, Gaurav R.; Göldel, Andreas; Pötschke, Petra; Heinrich, Gert

doi:10.1016/j.polymer.2011.01.007

Cited by 120 publications

(102 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Magnitude of the shear stresses required for dispersion of CNT is also dictated by the intrinsic characteristics of the CNT. Kasaliwal et al discuss the influence of PC melt viscosity and molecular weight on the level of MWCNT dispersion and conclude that lower matrix viscosity resulted in better melt infiltration leading to better MWCNT dispersion and hence lower electrical resistivities in the composite [81].…”

Section: Influence Of Raw Materialsmentioning

confidence: 99%

Thermoplastic Nanocomposites with Carbon Nanotubes

Sathyanarayana

Hübner²

2013

Structural Nanocomposites

View full text Add to dashboard Cite

The potential impact of light-weight structures with multifunctional properties for engineering applications drives significant research and development activities on nanocomposites. Polymer nanocomposites especially those with carbon nanotubes (CNTs) are very attractive for conductive composites with good structural characteristics. The biggest challenge facing the commercial success of CNT based composites is the intrinsic strength of their agglomerates which prevents good filler dispersion in the matrix, a key attribute for any reinforcement. This chapter is a review of the CNT incorporated thermoplastic composites processed mainly containing economic multi-walled carbon nanotubes (MWCNTs). We present an overview of CNTs (their structure, production process, properties, surface modification, applications etc.) and the mechanism of their dispersion in thermoplastic matrices. The processing of thermoplastic matrices via the conventional twin-screw compounding approach is discussed along with the influence of process parameters on MWCNT dispersion. The role of secondary processing operation on composite properties is also highlighted. The mechanical, electrical and thermal properties of the thermoplastic-CNT composites are reviewed highlighting the key findings and shortcomings. We conclude throwing some light on the developments on multi-scale reinforcements in polymeric matrices.

show abstract

Section: Influence Of Raw Materialsmentioning

confidence: 99%

Thermoplastic Nanocomposites with Carbon Nanotubes

Sathyanarayana

Hübner²

2013

Structural Nanocomposites

View full text Add to dashboard Cite

show abstract

“…Therefore, it is supposed that infiltration facilitates both rupture and erosion mechanisms leading to deagglomeration by applied shear stresses even at lower values than agglomerate cohesive strength. A systematic investigation performed by Kasaliwal et al [12] on model amorphous polymer matrices, i.e. polycarbonate (PC), exhibited that erosion mechanism could also be essential in deagglomeration of CNT agglomerates and it is most efficient in maintaining nanotube length than rupture mechanism.…”

Section: Introductionmentioning

confidence: 99%

Characterization of polyamide 6/carbon nanotube composites prepared by melt mixing-effect of matrix molecular weight and structure

Faghihi

Shojaei

Bagheri

2015

Composites Part B: Engineering

View full text Add to dashboard Cite

“…The viscosity change is large enough to induce a reduction in the size of the largest agglomerates due to the increased shear stresses transferred to the additive. In [14], smaller viscosity differences (of 1.2 times) had a significant impact on the large agglomerates.…”

Section: Impact Of Melt Viscosity (Starting Molecular Weight) and Addmentioning

confidence: 95%

“…The majority of recent studies examining the effect of operating conditions on dispersion focus on composites of multiwalled carbon nanotubes (MWCNTs) in polycarbonate [13,14], polylactic acid [15] and polycaprolactone [16] substrates. Organoclay/polypropylene composites are addressed in [17,18].…”

Section: Introductionmentioning

confidence: 99%

Investigating the impact of operating conditions on the extent of additive mixing during thermoplastic polymer extrusion

Stratiychuk-Dear

Looney²,

Oliver³

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Adequate dispersion of the additive in polymer composites is vital to their performance. Dispersion occurs via rupture, erosion and collision induced mechanisms. Organophosphorus salt/PET nanocomposites were manufactured on a co-rotating fully intermeshing pilot scale twin screw extruder to determine the impact of operating conditions on the mixing achieved in order to understand the level of control available over the process. The effect on key dispersion mechanisms is discussed. Dispersion was found to increase with decreasing throughput, increasing screw speed and increasing molecular weight of the polymer. Linear relationships between calculated parameters including specific mechanical energy, degree of fill and specific throughput were also observed. A need for a compromise between achieving the desired level of mixing and maintaining the molecular weight of the polymer is established.

show abstract

Influences of polymer matrix melt viscosity and molecular weight on MWCNT agglomerate dispersion

Cited by 120 publications

References 16 publications

Thermoplastic Nanocomposites with Carbon Nanotubes

Thermoplastic Nanocomposites with Carbon Nanotubes

Characterization of polyamide 6/carbon nanotube composites prepared by melt mixing-effect of matrix molecular weight and structure

Investigating the impact of operating conditions on the extent of additive mixing during thermoplastic polymer extrusion

Contact Info

Product

Resources

About