Effect of carbon nanotubes on the mechanical properties and crystallization behavior of poly(ether ether ketone)

Rong, Changru; Ma, Gang; Zhang, Shuling; Li, Song; Chen, Zheng; Wang, Guibin; Ajayan, Pulickel M.

doi:10.1016/j.compscitech.2009.11.024

Cited by 122 publications

(88 citation statements)

References 41 publications

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“…The same phenomena was also reported in literature for PP-based nanocomposites systems containing TiO 2 , treated with polyalcohol, and silica (SiO 2 ) [11,41] and, poly(ether ether ketone) (PEEK) containing carbon nanotubes [49]. There are two controlling phenomena in polymer crystallization: nucleation and diffusion.…”

Section: Fig 7 Dsc Thermograms Of Uncompatibilized (Pp-t) and Compasupporting

confidence: 54%

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Zohrevand

Ajji

Mighri

2013

Polymer Engineering & Sci

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Nanocomposites based on isotactic polypropylene (iPP) and titanium dioxide (TiO 2 ) nanoparticle containing 1-15 vol% (4.6-45.5 wt%) of the nanoparticle were prepared by the melt blending process. The effect of an anhydride-modified polypropylene as a compatibilizer on dispersion of TiO 2 nanoparticles was assessed using SEM. TGA and DSC analysis were performed to study the thermal properties of the nanocomposites. Crystalline structures of iPP in the presence of TiO 2 were analyzed by XRD. Mechanical properties of the nanoparticles were measured and a micromechanical analysis was applied to quantify interface interaction between the polymer and particle. SEM results revealed improvement of TiO 2 particle dispersion by adding the compatibilizer. It was shown that the thermal stability and crystalline structure of the nanocomposite are significantly affected by the state of particle dispersion. TiO 2 nanoparticles were shown to be strong b-nucleating agents for iPP, especially at concentrations less than 5 vol%. Presence of the b-structure crystals reduced the elastic modulus and yield strength of the nanocomposites. Micromechanical analysis showed enhanced interaction between organic and inorganic phases of the compatibilized nanocomposites. POLYM. ENG. SCI., 54:874-886, 2014.

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Section: Fig 7 Dsc Thermograms Of Uncompatibilized (Pp-t) and Compasupporting

confidence: 54%

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Zohrevand

Ajji

Mighri

2013

Polymer Engineering & Sci

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“…Therefore, the overall crystallization time of iPP/CRG composites is significantly shorter than neat iPP mentioned above. Furthermore, compared to previous studies, it is found that the nucleation of CRG is more efficient than that of other nanofillers, such as organoclay [44], nanotubes [37,45], golden nanoparticles [46].…”

Section: Isothermal Crystallization Behavior Of Ipp/crg Nanocompositesmentioning

confidence: 82%

“…However, high temperature can improve the mobile ability of polymer chain segment, which would make the crystal nuclei not stable at this condition. Accordingly, the crystallization rate decreases with the increasing crystallization temperature [37]. By comparing with neat iPP, the crystallization rate of iPP/CRG nanocomposites becomes significantly faster, especially at higher temperature, which may suggest that CRG fillers could provide sufficient nucleation sites to accelerate the crystallization kinetics.…”

Section: Isothermal Crystallization Behavior Of Ipp/crg Nanocompositesmentioning

confidence: 97%

Nonisothermal and isothermal crystallization behavior of isotactic polypropylene/chemically reduced graphene nanocomposites

Tang

Yang

et al. 2016

Polymer Composites

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Graphene oxide was firstly prepared by a modified Hummers method and then reduced via hydrazine reduction method to obtain chemically reduced graphene (CRG). The morphology of CRG dispersed in the isotactic polypropylene (iPP) matrix was observed using transmission electron microscope and rheological measurement methods. Nonisothermal and isothermal crystallization behaviors of iPP/CRG nanocomposites were investigated by differential scanning calorimetry and polarizing optical microscopy methods, respectively. Nonisothermal crystallization measurement revealed that CRG elevated the crystallization temperature of iPP due to the nucleating effect of CRG. And during isothermal crystallization process, the half time crystallization of nanocomposites was significantly reduced. Furthermore, the images of polarized optical microscopy also exhibited that the nucleation density of nanocomposites was much higher than that of neat iPP due to the heterogeneous nucleation of CRG even at a loading of 0.5%. POLYM. COMPOS., 38:E342–E350, 2017. © 2016 Society of Plastics Engineers

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“…This is consistent with reports which showed that the presence of CNTs increases the crystallization temperature of PEEK but does not influence the crystallinity. 23 We conclude, therefore, that the reduction of the ductile regime is not caused by any increased polymer crystallinity.…”

Section: A Tensile Strain Measurementsmentioning

confidence: 83%

Origin of mechanical modifications in poly (ether ether ketone)/carbon nanotube composite

Pavlenko

Boyer

Puech

et al. 2014

Journal of Applied Physics

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Variations in the hardness of a poly (ether ether ketone) beam electrically modified with multi-walled carbon nanotubes (MWCNT, 0.5%-3%) are investigated. It is shown that both rupture and hardness variations correlate with the changes in carbon nanotube concentration when using micro indentation and extended Raman imaging. Statistical analysis of the relative spectral intensities in the Raman image is used to estimate local tube concentration and polymer crystallinity. We show that the histogram of the Raman D band across the image provides information about the amount of MWCNTs and the dispersion of MWCNTs in the composite. We speculate that we have observed a local modification of the ordering between pure and modified polymer. This is partially supported by small angle neutron scattering measurements, which indicate that the agglomeration state of the MWCNTs is the same at the concentrations studied.

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Effect of carbon nanotubes on the mechanical properties and crystallization behavior of poly(ether ether ketone)

Cited by 122 publications

References 41 publications

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Nonisothermal and isothermal crystallization behavior of isotactic polypropylene/chemically reduced graphene nanocomposites

Origin of mechanical modifications in poly (ether ether ketone)/carbon nanotube composite

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Effect of carbon nanotubes on the mechanical properties and crystallization behavior of poly(ether ether ketone)

Cited by 122 publications

References 41 publications

Morphology and properties of highly filled iPP/TiO2 nanocomposites

Morphology and properties of highly filled iPP/TiO2 nanocomposites

Nonisothermal and isothermal crystallization behavior of isotactic polypropylene/chemically reduced graphene nanocomposites

Origin of mechanical modifications in poly (ether ether ketone)/carbon nanotube composite

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Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Morphology and properties of highly filled iPP/TiO₂ nanocomposites