Rheological and electrical properties of carbon black‐based poly(vinylidene fluoride) composites

Wang, Jianghong; Wu, Defeng; Li, Xiang; Zhang, Ming

doi:10.1002/pen.23519

Cited by 11 publications

(4 citation statements)

References 51 publications

(76 reference statements)

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“…However, conductivity of CB/PVDF composites was essentially unchanged when the content of CB was lower than 7.42 vol%. It was corresponding with the results that the percolation threshold of CB/PVDF composites by melt‐blending was above7.8 vol% in previous studies .…”

Section: Resultssupporting

confidence: 91%

Studies on synergistic effect of CNT and CB nanoparticles on PVDF

Zhang

Ruan

2014

Polymer Composites

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Poly(vinylidene fluoride) (PVDF) nanocomposites with different loading of carbon nanotubes (CNT) and carbon black (CB) were prepared by melt blending method. The conductivity and mechanical properties of the nanocomposites were investigated. The results showed that percolation threshold of CNT/CB/PVDF nanocomposites appeared at a lower concentration (1.25 vol% CNT) than that of CNT/PVDF (>2.08 vol% CNT). The tensile strength of CNT/CB/PVDF nanocomposites was also improved, with 32.1% increase compared to PVDF and 18.0% increase compared to CNT/ PVDF at loading of 1.25 vol% CNT/0.96 vol% CB. To explore the synergistic effect of CNT and CB, nonisothermal crystallization and isothermal crystallization behaviors of PVDF and its nanocomposites were studied by differential scanning calorimetry, and the crystallization morphology of them was observed under the three dimensional digital microscope with the polarized model. The crystallization rate of PVDF was speeded up markedly because of heterogeneous nucleation effect of nanoparticles, and CNT and CB nanoparticles had a synergistic effect on nucleation. Polarized microscope observation confirmed that spherulite size of PVDF became smaller owing to the accelerating of crystallization, which influenced the distribution of nanoparticles. The dispersion of nanofillers in matrix was observed by scanning electron microscope. It was revealed that CB could make CNT disperse more evenly in the PVDF matrix. The synergies network of CNT and CB is suggested to build in matrix, which improved conductivity and mechanical properties of PVDF nanocomposites. POLYM. COMPOS., 36:2248-2254, 2015

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Section: Resultssupporting

confidence: 91%

Studies on synergistic effect of CNT and CB nanoparticles on PVDF

Zhang

Ruan

2014

Polymer Composites

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“…This can be explained by the fact that the conductive additive content necessary for the formation of an electrically conductive network is higher than that required for the rheological percolation network [8,23]. According to Zhang et al (2008), the electrical percolation threshold is reached when the conductive additives are very close to each other or even in contact with each other, forming conducting pathways.…”

Section: Electrical Conductivitymentioning

confidence: 95%

“…On the other hand, the rheological percolation threshold is reached when a critical additive content restricts the movement of the polymer chains. In this case, the particles of the conductive additive are not necessarily in contact with each other [8,12,23].…”

Section: Electrical Conductivitymentioning

confidence: 96%

Processing and characterization of conductive composites based on poly(styrene-b-ethylene-ran-butylene-b-styrene) (SEBS) and carbon additives: A comparative study of expanded graphite and carbon black

Kuester

Merlini

Barra

et al. 2016

Composites Part B: Engineering

101

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“…The k values of three-dimensional nanoparticles, such as silica and carbon black, commonly range from 4 to 10 because of irregular shape of their aggregates by fusion of primary particles. 55,62,63 The onedimensional nanoparticles, such as CNTs, have far larger k values ranged from 15 to 30 because of the formation of clusters with large aspect ratios. 55,64 In this work, the k value of CNTs in the matrix PBAT is about 20, located in a common value range of the filler with high aspect ratios and nearly independent on the CNT loadings (Table 5).…”

Section: Linear Dynamic Rheology Of the Pbat/cnt Compositesmentioning

confidence: 99%

Viscoelastic behavior and model simulations of poly(butylene adipate-co-terephthalate) biocomposites with carbon nanotubes: Hierarchical structures and relaxation

Ding

Wei

Zhou

et al. 2015

Journal of Composite Materials

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Poly(butylene adipate-co-terephthalate) (PBAT) biocomposites containing carbon nanotubes (CNTs) were prepared by melt compounding. The linear viscoelasticity of composites, including creep, creep recovery and stress relaxation in the solid state, and dynamic shear flow in the molten state, were studied and then further described by the viscoelastic models, aiming at exploring relaxation of hierarchical structures of CNTs and obtaining structural parameters of CNTs in PBAT matrix. The results reveal that CNTs are dispersed mainly as flocs or small aggregates in PBAT, which is further confirmed by the structural parameters of CNTs obtained through model simulations on the dynamic rheological responses of composites. The presence of CNTs retards overall kinetics of creep and stress relaxation of PBAT. This is attributed to highly restrained viscoelastic and viscoplastic deformation of PBAT chain coils, rather than slightly confined elastic deformation of chain segments because the chain coils is in the same size-scale with the CNT flocs.

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Rheological and electrical properties of carbon black‐based poly(vinylidene fluoride) composites

Cited by 11 publications

References 51 publications

Studies on synergistic effect of CNT and CB nanoparticles on PVDF

Studies on synergistic effect of CNT and CB nanoparticles on PVDF

Processing and characterization of conductive composites based on poly(styrene-b-ethylene-ran-butylene-b-styrene) (SEBS) and carbon additives: A comparative study of expanded graphite and carbon black

Viscoelastic behavior and model simulations of poly(butylene adipate-co-terephthalate) biocomposites with carbon nanotubes: Hierarchical structures and relaxation

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