Effect of particle–particle and polymer–particle interactions on nanosilica aggregation in polystyrene

Shahrezaei, Mohamad Ali Sanjari; Goharpey, Fatemeh; Foudazi, Reza

doi:10.1002/pc.24287

Cited by 14 publications

(10 citation statements)

References 39 publications

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“…The lines around the particles indicated that it caused the extra stress concentration. When adding to the particles to the matrix, the wetting of the particles with the matrix was very important [31]. The presence of particle traces on the fracture surfaces indicated that the particles were held in place by the matrix material.…”

Section: Morphology Of the Compositesmentioning

confidence: 99%

The Effect of Various Ti6Al4V Powders on the Behavior of Particle-Reinforced Polyester Matrix Composites

2023

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In this study, recycled and commercial Ti6Al4V powder was added to polyester composites at various filling ratios by weight fraction. Three weight fractions of Ti6Al4V particles, 0%, 5%, and 10%, were chosen for study. By examining the mechanical and microstructural properties of polyester composites, the effects of the Ti6Al4V powder proportion by weight fraction and particle size parameters were investigated. With the filler loading, a 39% increase in the tensile strength of the composites was achieved. A minor decrease in flexural strength was observed at 5% filler weight fraction. The addition of the recycled Ti6Al4V powder to the polyester matrix slightly reduced the thermal conductivity of the composite over that of the neat polymer. However, the incorporation of the commercial Ti6Al4V powder fillers in the polyester matrix considerably increased the thermal conductivity of the composites, suggesting several potential uses. The presence of high levels of oxygen in the powder led to reduced thermal conductivity of the composites due to the reduction in phonon scattering.

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Section: Morphology Of the Compositesmentioning

confidence: 99%

The Effect of Various Ti6Al4V Powders on the Behavior of Particle-Reinforced Polyester Matrix Composites

2023

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“…We used 1 g CNT to make 1 L CNT suspension, and therefore the weight ratio of CNT:SDS was set to 1:23 in the 1 L of deionized water. 26…”

Section: Experimental Studymentioning

confidence: 99%

“…We used 1 g CNT to make 1 L CNT suspension, and therefore the weight ratio of CNT:SDS was set to 1:23 in the 1 L of deionized water. 26 In order to create CNT suspension, the materials were prepared and stirred for 15 min, then uniformly dispersed in deionized water with sonication process. According to Figure 2, the sonication process was done with BANDELIN-HD 3200 with the probe model VS-70T.…”

Section: Preparation Of Cnt Suspensionmentioning

confidence: 99%

Electrical properties of stretchable and skin–mountable PDMS/MWCNT hybrid composite films for flexible strain sensors

Nankali

Nouri

Malek

et al. 2019

Journal of Composite Materials

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Flexible strain sensors based on carbon nanofillers have great potential in the application of skin-adhesive sensors, wearable sensors, and tactile sensors, due to their superior electrical properties. Herein, the electrical properties of highly sensitive PDMS/MWCNT strain sensors made by vacuum filtration method were investigated. In order to obtain the electrical percolation curve of the flexible conductive films, first different samples were made with the same surface area but with different wt. % of CNTs. Then, depending on CNT content, the obtained conductive films exhibited initial electrical resistance in the range of 12.5 KΩ to 22.8 MΩ. The piezoresistive films with the CNT concentration of 1.4 to 2.9 [Formula: see text] had shown superior resistance drop, so this interval was determined as the percolation threshold region. According to the SEM images, the nanocomposite layer thickness of the flexible strain sensors in this region was 790 nm to 1210 nm. Afterward, the percolation curve was obtained using curve fitting to the experimental data and the exact value of the percolation threshold was defined as [Formula: see text]. Finally, in order to determine the minimum gauge factor ([Formula: see text]) of the sensors in percolation region, a flexible strain sensor in the upper limit of this region was selected and the piezoresistive properties of the selected sample were investigated.

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“…17,18,22 Hence, model simulation of the rheological response of nanocomposites can offer us an outline for the description/prediction of their properties as a function of process and material parameters. [23][24][25][26][27] Experimental results of polymer nanocomposites' viscoelasticity display a substantial improvement in the glassy state (elasticity plateau modulus) with increasing the nanofiller loading. Additionally, under certain conditions, a level of the storage modulus, that is, a weak frequency dependence, was detected at very low frequencies, revealing a solid-like behavior.…”

Section: Introductionmentioning

confidence: 99%

Study of the matrix–particle interactions of polymer nanocomposites in the low‐frequency regime

Kontou

2024

Polymer Composites

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In this study, the dynamic moduli, in a wide frequency scale, of two series of polymer nanocomposites were qualitatively discussed. The dynamic mechanical analysis experimental results of polylactic acid (PLA)/silica nanocomposites, as well as PLA/graphene oxide‐carbon nanotubes hybrid nanocomposites, were employed. The study has been focused on the low‐frequency regime, estimating the terminal incline of the storage and loss modulus. In addition, the relative position of the two dynamic moduli was examined and results about the nanofiller's dispersion quality, as well as their interaction with the matrix were extracted. The consequence of nanofiller kind, loading, and distribution quality on the mechanical enhancement was thoroughly studied. In addition, the storage modulus master curves could be simulated by a model from the literature, considering the topological constraints of an entangled polymer reinforced by nanoparticles. It was shown that by adopting the linear contribution of the free and adsorbed chains to the relaxation function, the details of the master curves could be captured in the entire frequency range, quite effectively. The estimated model parameter values confirmed the analysis of the matrix–particle interactions.Highlights The SiO2 size effect on the terminal zone slope of the dynamic moduli. Successful description of the dynamic moduli by the tube reptation concept. Analysis of the physical meaning of the model parameter values. Relation between SiO2 dispersion quality and molecular motion restriction. Matrix‐particle interactions is the governing mechanism of enhancement.

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Effect of particle–particle and polymer–particle interactions on nanosilica aggregation in polystyrene

Cited by 14 publications

References 39 publications

The Effect of Various Ti6Al4V Powders on the Behavior of Particle-Reinforced Polyester Matrix Composites

The Effect of Various Ti6Al4V Powders on the Behavior of Particle-Reinforced Polyester Matrix Composites

Electrical properties of stretchable and skin–mountable PDMS/MWCNT hybrid composite films for flexible strain sensors

Study of the matrix–particle interactions of polymer nanocomposites in the low‐frequency regime

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