Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

Paglicawan, Marissa A.; Kim, Jin Kuk; Bang, Daesuk

doi:10.1002/pc.20786

Cited by 12 publications

(9 citation statements)

References 27 publications

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“…Additionally, these figures show that the modulus increased proportionally to the nanoclay concentration. The similar phenomenon was reported by different authors [10,13,[36][37][38][39].…”

Section: Dynamic Mechanical Analysis (Dma)supporting

confidence: 86%

Nanoindentation and dynamic mechanical properties of PP/clay nanocomposites

et al. 2012

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Polypropylene/clay nanocomposites were prepared by melt blending technique. A PP homopolymer was melt blended with commercial nanoclay masterbatch at different concentration (5, 10 and 15 wt% of nanoclay) using Laboratory Mixing Extruder (LME). The morphology of the nanocomposites was characterized using Scanning Electron Microscope (SEM). The viscoelastic and thermomechanical properties were analyzed via Dynamic Mechanical Analysis (DMA). The morphological analysis showed that the nanoclay was well distributed in the PP matrix. The DMA analysis showed an increase in storage modulus of nanocomposites which indicates an enhancement of stiffness and thermal stability of the prepared nanocomposite samples. In addition, a nanoindentation test was performed to determine the dynamic nanomechanical properties of two nanocomposites samples (NS-5 and NS-15). Load sweep test results showed that NS-15 has a slightly higher storage and loss modulus than that of NS-5. Both the samples also showed a decreasing modulus as a function of depth, indicating the presence of a stiffer surface layer in the samples. Frequency sweep tests were also performed on each sample, and display a moderate viscoelasticity with modulus values that increased slightly as a function of frequency. Loadcontrolled ramping force scratch test was also carried out and the results showed that NS-15 had a greater elastic recovery than sample NS-5 as well as a greater overall scratch resistance.

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“…Additionally, these figures show that the modulus increased proportionally to the nanoclay concentration. The similar phenomenon was reported by different authors [10,13,[36][37][38][39].…”

Section: Dynamic Mechanical Analysis (Dma)supporting

confidence: 86%

Nanoindentation and dynamic mechanical properties of PP/clay nanocomposites

et al. 2012

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“…This same observation was reported by other authors. 32,33,39 The modulus of PP78 and PP78 þ 5 was close to each other, and then there was an abrupt increase in the modulus for PP78 þ 10 and PP78 þ 15. One possible Figure 6 Schematic illustation of neat resin (a), nanocomposite with relative large nanoparticles (b) and nanocomposite with relatively small nanoparticles (c).…”

Section: Viscoelastic Analysis: Experimentalmentioning

confidence: 76%

“…Similar results were seen by different authors. 30,[32][33]39 Moreover, this figure shows that G' increased proportionally to the loading of the nano clay. This same observation was reported by other authors.…”

Section: Viscoelastic Analysis: Experimentalmentioning

confidence: 81%

“…Several authors reported simi-lar increase in the modulus as the percentage of the nanoclay increased. [30][31][32][33] Nanoclay tends to accumulate in the amorphous region of the matrix similar to interstitial defects seen in alloying. Figure 6 schematically illustrates this concept.…”

Section: Viscoelastic Analysis: Experimentalmentioning

confidence: 97%

“…It should be noted that the improvement in moduli reported in this work is comparable with that reported in the literature. Paglicawan et al 32 studied polystyrene-b-poly(ethylene/butylene)-b-polystyrene (SEBS) triblock coplymer with the presence of multi-wall carbon nanotubes (MWNTs). They reported around 200% increase in storage modulus at 5 wt % MWNT loading compared to 1 wt % loading.…”

Section: Viscoelastic Analysis: Modelingmentioning

confidence: 99%

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Viscoelastic properties of polypropylene/organo‐clay nano‐composites prepared using miniature lab mixing extruder from masterbatch

Ali

Elleithy

2011

J of Applied Polymer Sci

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Polypropylene (PP) was melt blended with nano organo-clay masterbatch at different ratios; namely 5, 10, and 15 wt % of nano-clay. The effect of organo-clay content on the viscoelastic properties of the nano-composite was studied. A miniature laboratory mixing extruder, LME, was used to blend the nano organo-clay masterbatch with PP at 260 C and 250 rpm. The blend was pelletized first, and then a thin ribbon was extruded. Two viscoelastic tests were performed; frequency sweep at constant temperature of 80 C, and temperature sweep at constant frequency of 1.0 rad/s. As the loading of nano-clay increased, the storage modulus, G', and the thermal resist-ance increased as well. Different viscoelastic models were tried and 3-elements Maxwell model was found to describe well the viscoelastic properties of the nano-composites. The ratio of the complex modulus to the corresponding matrix modulus at different frequencies was found to vary proportional to the nanoclay loading. This dependency was described reasonably well by modified Guth model using particle aspect ratio of 12.1.

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Epoxy composites based on inexpensive char filler obtained from plastic waste and natural resources

et al. 2013

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In this study, plastic [polyethylene terephthalate (PET)] waste was recycled as raw material for the preparation of diglycidyl ether of bisphenol A-type epoxy composite materials. The other inexpensive fillers used to prepare the composites were wood shavings char and pine cone char (PCC), obtained from natural resources. The thermogravimetric analysis showed that plastic waste char (PWC) and PCC can significantly improve the thermal stability of neat epoxy resin at temperatures above 3008C. The best thermal and electrical conductivity results were obtained with PWC. The residual weight of the composite with 30 wt% PWC was 69%. Surface hardness, Young's modulus, and tensile strength of the composites were higher than those with a pure epoxy polymer matrix. The composite morphology was characterized by X-ray diffraction and scanning electron microscopy. POLYM. COMPOS., 34:500-

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Dispersion of multiwalled carbon nanotubes in thermoplastic elastomer gels: Morphological, rheological, and electrical properties

Cited by 12 publications

References 27 publications

Nanoindentation and dynamic mechanical properties of PP/clay nanocomposites

Nanoindentation and dynamic mechanical properties of PP/clay nanocomposites

Viscoelastic properties of polypropylene/organo‐clay nano‐composites prepared using miniature lab mixing extruder from masterbatch

Epoxy composites based on inexpensive char filler obtained from plastic waste and natural resources

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