A simple model for constant storage modulus of poly (lactic acid)/poly (ethylene oxide)/carbon nanotubes nanocomposites at low frequencies assuming the properties of interphase regions and networks

Zare, Yasser; Rhim, Sungsoo; Garmabi, Hamid; Rhee, Kyong Yop

doi:10.1016/j.jmbbm.2018.01.037

Cited by 72 publications

(18 citation statements)

References 43 publications

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“…The interphase as a different phase in polymer nanocomposites is commonly formed due to the outstanding surface area of nanoparticles, which causes strong interfacial interaction between polymer matrix and nanoparticles [37,38]. It was reported that the interphase regions positively affect the mechanical properties of polymer nanocomposites [39,40].…”

Section: Introductionmentioning

confidence: 99%

Calculation of the Electrical Conductivity of Polymer Nanocomposites Assuming the Interphase Layer Surrounding Carbon Nanotubes

Zare

Rhee

2020

Polymers

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The interphase layer surrounding nanoparticles can reflect the tunneling effect as the main mechanism of charge transferring in polymer/carbon nanotube (CNT) nanocomposites (PCNT). In this paper, the percolation threshold, effective volume fraction of CNT, and the portion of percolated filler after percolation are expressed by interphase and CNT waviness. Moreover, the developed terms are used to suggest the influences of CNT dimensions, interphase thickness, and waviness on the electrical conductivity of PCNT by conventional and developed models. Thin and long CNT, thick interphase, and low waviness obtain a high fraction of percolated CNT. However, the highest level of effective filler fraction is only calculated by the thinnest CNT and the thickest interphase. Furthermore, both models show that the thinnest and the longest CNT as well as the thickest interphase and the least CNT waviness cause the highest conductivity in PCNT, because they positively contribute to the formation and properties of the conductive network.

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Section: Introductionmentioning

confidence: 99%

Calculation of the Electrical Conductivity of Polymer Nanocomposites Assuming the Interphase Layer Surrounding Carbon Nanotubes

Zare

Rhee

2020

Polymers

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“…Consequently, the Ouali model suitably shows the "R" and "t" roles in the relative modulus accounting the percolating of interphase. In addition to the percolating effect of interphase, the good reinforcing efficiency of interphase has been well reported [51,52], due to its higher modulus compared to polymer matrix. Figure 4 illustrates the "R" and "t" influences on the relative strength according to Pukanszky model at σ m = 40 MPa, φ f = 0.02, σ i = 100 MPa and l = 5 µm.…”

Section: Resultsmentioning

confidence: 98%

Analysis of the Connecting Effectiveness of the Interphase Zone on the Tensile Properties of Carbon Nanotubes (CNT) Reinforced Nanocomposite

Zare

Rhee

2020

Polymers

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The establishment of interphase region around nanoparticles accelerates the percolating of carbon nanotubes (CNT) in polymer nanocomposites reinforced with CNT (PCNT), due to the linking productivity of interphase district before the physical connecting of nanoparticles. Therefore, the interphase is an important character in the networks of CNT in PCNT. Here, a simulation study is presented to investigate the interphase connection in the mechanical possessions of PCNT including tensile modulus and strength. A number of models comprising Takayanagi, Ouali, Pukanszky and Callister are developed by the assumption of an interphase district in the CNT excluded volume. The advanced models depict the optimistic influences of reedy and lengthy CNT besides dense interphase on the stiffness and tensile power of nanocomposites. The Pukanszky calculations depict that the interphase strength plays a more noteworthy role in the nanocomposites strength compared to the CNT length.

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“…The interphase regions commonly appear in polymer nanocomposites, due to the exceptional surface area of nanoparticles per weight and strong interfacial interaction between polymer matrix and nanofiller . The direct dependence of mechanical properties of polymer nanocomposites to the interphase thickness and modulus was discussed in the previous reports . A number of authors have also suggested that the interphase regions reduce the percolation level of nanoparticles in polymer nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

Simulation of tunneling distance and electrical conductivity for polymer carbon nanotubes nanocomposites by interphase thickness and network density

2020

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This article develops simple equations for tunneling distance between adjacent nanoparticles (d) and electrical conductivity of polymer/carbon nanotubes (CNT) nanocomposites (PCNT). The developed model considers the significances of CNT dimensions and waviness as well as interphase region surrounding CNT on the conductivity of nanocomposites. Moreover, d is defined by the sizes of CNT, interphase thickness and network density. The roles of all parameters for nanoparticles, interphase, percolation threshold and conductive network in the nanocomposite conductivity and tunneling distance are determined. Among the studied parameters, the fraction of percolated CNT of 0.6 and d = 1 nm provide the highest conductivity of PCNT, while d > 2.5 nm cause an insulated nanocomposite. In addition, the high concentration of thin CNT, a thick interphase, poor waviness, low percolation threshold, and the small fraction of percolated CNT produce an optimized level for d.

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A simple model for constant storage modulus of poly (lactic acid)/poly (ethylene oxide)/carbon nanotubes nanocomposites at low frequencies assuming the properties of interphase regions and networks

Cited by 72 publications

References 43 publications

Calculation of the Electrical Conductivity of Polymer Nanocomposites Assuming the Interphase Layer Surrounding Carbon Nanotubes

Calculation of the Electrical Conductivity of Polymer Nanocomposites Assuming the Interphase Layer Surrounding Carbon Nanotubes

Analysis of the Connecting Effectiveness of the Interphase Zone on the Tensile Properties of Carbon Nanotubes (CNT) Reinforced Nanocomposite

Simulation of tunneling distance and electrical conductivity for polymer carbon nanotubes nanocomposites by interphase thickness and network density

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