On the determination of elastic properties of composites of polycarbonate and multi-wall carbon nanotubes in the melt

Handge, Ulrich A.; Zeiler, Rico; Dijkstra, Dirk J.; Meyer, Helmut; Altstädt, Volker

doi:10.1007/s00397-011-0558-x

Cited by 23 publications

(9 citation statements)

References 45 publications

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“…The addition of MWCNT to polyetherimide yields an increase of the dynamic moduli G ′ and G ″ in the whole frequency range. The increase of G ′ is caused by the elastically deformable carbon nanotubes and elastic MWCNT–MWCNT interactions . The increase of G ″ results from the spatially non‐uniform velocity field caused by the addition of carbon nanotubes.…”

Section: Resultsmentioning

confidence: 99%

“…The increase of G 0 is caused by the elastically deformable carbon nanotubes and elastic MWCNT-MWCNT interactions. [35,36] The increase of G 00 results from the spatially non-uniform velocity field caused by the addition of carbon nanotubes. At low frequencies, the onset of a plateau of G 0 can be seen for the composites, which indicates a solid-like behavior.…”

Section: Rheologymentioning

confidence: 99%

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Solvent-Free Preparation of Electrically Conductive Polyetherimide Membranes Using Carbon Nanotubes

Otto

Handge

Aschenbrenner

et al. 2015

Macromol. Mater. Eng.

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A chemical‐free option to reduce membrane fouling is the use of electrical fields for membranes. To maximize the strength of the electric field in compact membrane module constructions, electrically conductive membranes are preferred to only conductive supports. Conductive, porous membranes are sintered from polyetherimide powder particles that are surface‐covered with multi‐walled carbon nanotubes (MWCNT). The fusion of the surface‐covered particles forms a conductive MWCNT network in the composite, with a large number of inter‐MWCNT contacts. Membranes with a high specific electrical conductivity of up to 2.28 Sm−1 at a concentration of 3.0 wt% MWCNT are produced in an adapted sintering process. The sintering behavior of decorated particles depends on the coverage of the polymer particles with MWCNT.

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Section: Resultsmentioning

confidence: 99%

Section: Rheologymentioning

confidence: 99%

Solvent-Free Preparation of Electrically Conductive Polyetherimide Membranes Using Carbon Nanotubes

Otto

Handge

Aschenbrenner

et al. 2015

Macromol. Mater. Eng.

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“…For an experimental quantification in predicting extrudate swelling using a creep recovery test: typically the recoverable compliance J r is determined, which is positively correlated to extrudate swelling [29,31,32]. After the stress is removed, the ratio between recoverable strain γ r as a function of recovery time t r , and stress applied σ 0 gives the recoverable compliance [33]:…”

Section: Analysing Extrudate Swelling Through Creep Recoverymentioning

confidence: 99%

Polymeric Additive Manufacturing: The Necessity and Utility of Rheology

Elbadawi¹

2018

Polymer Rheology

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Additive manufacturing techniques have recently seen an explosive growth across a myriad of fields, partly galvanised by their advantages over traditional fabrication techniques. As with most fabrication processes, maximising efficiency is a requisite, particularly if commercialisation is sought-after. Understanding how the material behaves during additive manufacturing is necessary to accomplishing said task. Accordingly, the chapter herein collates examples of where rheology is applicable in polymer-based additive manufacturing techniques, thereby demonstrating the necessity and utility thereto. The main focus herein will be fused deposition modelling and stereolithography additive manufacturing techniques, with examples of how both capillary and rotational rheometers can be utilised.

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“…This is evoked by the high surface area of the nanofiller, accompanied by a high interface area [22,23,85]. Furthermore the formation of percolated CNT networks can contribute [30,[85][86][87][88][89][90]. This tremendous increase in viscosity impedes the impregnation process of FRPs produced by LCM, where a maximum viscosity of $ 200 mPa s is desirable for achieving lowporosity laminates.…”

Section: Flow Behavior and Reactivitymentioning

confidence: 99%

The role of multi-walled carbon nanotubes in epoxy nanocomposites and resin transfer molded glass fiber hybrid composites: Dispersion, local distribution, thermal, and fracture/mechanical properties

et al. 2015

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Hybrid composites containing endless glass fiber reinforcement and surface-functionalized carbon nanotubes (CNTs) dispersed in the matrix phase were produced by resin transfer molding (RTM). An efficient surface modification of the nanotubes enhances the compatibility with the matrix system and the dispersion quality, enabling the impregnation process via liquid composite molding. We assessed the quality of the RTM process by newly developed methodologies for the quantification of the filtering of CNTs. First, we established a method to analyze the CNT length distribution before and after injection for thermosetting composites to characterize length-dependent withholding respectively the size distribution of nanotubes in the hybrid composites. Second, the resulting test laminates were locally examined by Raman spectroscopy and compared to reference (nanocomposite) samples of known CNT content to non-destructively quantify the local CNT concentration along the resin flow path. Moreover, the thermal and mechanical properties of the modified composites were investigated.

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On the determination of elastic properties of composites of polycarbonate and multi-wall carbon nanotubes in the melt

Cited by 23 publications

References 45 publications

Solvent-Free Preparation of Electrically Conductive Polyetherimide Membranes Using Carbon Nanotubes

Solvent-Free Preparation of Electrically Conductive Polyetherimide Membranes Using Carbon Nanotubes

Polymeric Additive Manufacturing: The Necessity and Utility of Rheology

The role of multi-walled carbon nanotubes in epoxy nanocomposites and resin transfer molded glass fiber hybrid composites: Dispersion, local distribution, thermal, and fracture/mechanical properties

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