Rheological and thermal properties of epoxy nanocomposites reinforced with alkylated multi‐walled carbon nanotubes

Heo, Gun‐Young; Park, Soo‐Jin

doi:10.1002/pi.4215

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…In general, G′ values of systems with functionalized MWCNTs were higher than those for AR-MWCNT, due to increased resin-nanotube interactions for the surface-modified MWCNTs in agreement with results for MWCNT/DGEBA resin systems [14], and G′ values are also seen to increase with increasing MWCNT level. The viscoelastic properties of resin-nanofiller dispersions in dynamic rheology measurements are sensitive to both the dispersion state of the filler and interaction between the filler and the resin [9,20], particularly when the nanofillers begin to form a percolated network at a critical addition level, i.e. the percolation threshold (PT).…”

Section: Figure 2 Ftir Spectra Of the Mwcntsmentioning

confidence: 99%

Rheological percolation behaviour and fracture properties of nanocomposites of MWCNTs and a highly crosslinked aerospace-grade epoxy resin system

Liu

Wilkinson

2018

Composites Part A: Applied Science and Manufacturing

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The effects of incorporating MWCNT in an aerospace-grade high functionality epoxy resin system are reported. Oscillatory-shear rheology showed as-received MWCNT (AR-MWCNT) to have a low degree of interaction with the resin, and consequently G′ values were low, whereas G′ values for functionalized MWCNTs (amino and oxidised) were higher due to increased resin-nanotube interactions. The three approaches used to obtain rheological percolation thresholds all showed values to increase in an order reflecting the improved MWCNT dispersion imparted by functionalisation. Analysis using colloidal dispersion theory fitted better with the experimental data than statistical percolation theory, and more closely mirrors the clustering of MWCNT agglomerates to form a percolated network. Fracture studies showed toughness decreased with AR-MWCNT addition, whereas for functionalised MWCNT addition toughness increased. For AR-MWCNT nanocomposites, nanotube debonding predominated and large weakly-bonded agglomerates were formed which reduced fracture toughness. In contrast, functionalised MWCNTs mainly exhibited fracture and pull-out and formed smaller agglomerates which toughened the matrix via crack-deflection and pinning.

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Section: Figure 2 Ftir Spectra Of the Mwcntsmentioning

confidence: 99%

Rheological percolation behaviour and fracture properties of nanocomposites of MWCNTs and a highly crosslinked aerospace-grade epoxy resin system

Liu

Wilkinson

2018

Composites Part A: Applied Science and Manufacturing

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“…In this paper the crossover of G´and G˝ (i.e. G´ = G˝ and tan δ = 1) was used to evaluate the gel time [11,12]. Fig.…”

Section: Gel Time Determination (Time Sweep Tests)mentioning

confidence: 99%

Effect of Additives on the Rheological Properties of Fast Curing Epoxy Resins

Wang¹,

Lakho²,

Yao³

2015

Epitoanyag - JSBCM

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rapid resin transfer molding (rtm) process is suitable for high-throughput manufacturing of complex-shaped composite parts. ideally the epoxy system should exhibit low viscosity and long gel time at room temperature for quick mold filling, and very fast curing once the resin is inside the heated mold. the present research was performed on different epoxy formulations by varying the concentrations of diluent and catalyst. rheological studies were carried out to measure the flow viscosity and to determine the gel time at different temperatures. it is noted that the addition of diluent effectively decreases the viscosity of formulation, and the addition of imidazole affects the rate of epoxy cure. several epoxy resin formulations were studied and compared with the commercially available infusion-grade epoxy system of Araldite Ly 8601/Aradur 8602. the results show that epoxy systems such as that containing 5% imidazole and 10% reactive diluent are suitable for the rapid rtm process with balanced flow and cure characteristics.

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Dramatic enhancement of carbon nanotube dispersion in polyimide composites by a two-step amino functionalization approach

Chen

Lin

Yang

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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Rheological and thermal properties of epoxy nanocomposites reinforced with alkylated multi‐walled carbon nanotubes

Cited by 4 publications

References 21 publications

Rheological percolation behaviour and fracture properties of nanocomposites of MWCNTs and a highly crosslinked aerospace-grade epoxy resin system

Rheological percolation behaviour and fracture properties of nanocomposites of MWCNTs and a highly crosslinked aerospace-grade epoxy resin system

Effect of Additives on the Rheological Properties of Fast Curing Epoxy Resins

Dramatic enhancement of carbon nanotube dispersion in polyimide composites by a two-step amino functionalization approach

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