Synthesis of polypropylene wrapped carbon nanotubes composite via <i>in situ</i> graft method with maleic anhydride

Li, W. H.; Chen, X. H.; Li, S. N.; Xu, Lida; Yang, Zhi

doi:10.1179/174328407x213279

Cited by 8 publications

(5 citation statements)

References 24 publications

(29 reference statements)

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“…Table 1 presents an increase in the degree of crystallinity with the addition of CNTs into iPP matrix, thus verifying the observation that the nanotubes act as nucleation sites. These results are in good agreement with the results of earlier studies [25,26]. It is also evident that the effect is more pronounced in the case of f-CNTs.…”

Section: It Is Evident From Table 1 That the Crystallization Temperature Of Ipp Shifts Tosupporting

confidence: 92%

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Effect of –COOH Functionalized Carbon Nanotubes on Mechanical, Dynamic Mechanical and Thermal Properties of Polypropylene Nanocomposites

Girei

Thomas

Atieh

et al. 2011

Journal of Thermoplastic Composite Materials

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Multi-walled carbon nanotubes (CNTs) were functionalized on treatment with nitric acid and the surface-modified CNT was characterized using Fourier transform infrared spectroscopy (FTIR). Isotactic polypropylene (iPP)/CNT composites at different CNT loadings (i.e., 0.1, 0.25, 1.00, and 5.00 wt%) were prepared by melt blending in a mini blender. The differential scanning calorimetric (DSC) studies showed the nucleating effect of CNTs on the crystallization behavior of iPP. Results of X-ray diffraction studies are in conformity with the results of DSC studies. Results of stress-strain measurements reveal that Young's modulus increases, while elongation at break decreases with increase in CNT loading and the ductility of the composites is adversely affected at high loading of CNTs (41.0 wt%). Functionalization of CNTs causes an improvement in Young's modulus, at all loadings studied, but elongation at break increases only up to 0.25%. At higher loading, the elongation at break drops down. Storage modulus increases with increase in CNT loading and the effect is greater in the case of

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Section: It Is Evident From Table 1 That the Crystallization Temperature Of Ipp Shifts Tosupporting

confidence: 92%

“…In the case of crystallization behavior of iPP, there are reports on insignificant variation in the degree of crystallinity on the incorporation of CNTs [21,22]. Some studies reported a decrease [23,24], while some others reported a marginal increase in the crystallization of iPP on incorporation of CNTs [25,26].…”

Section: Introductionmentioning

confidence: 99%

Effect of –COOH Functionalized Carbon Nanotubes on Mechanical, Dynamic Mechanical and Thermal Properties of Polypropylene Nanocomposites

Girei

Thomas

Atieh

et al. 2011

Journal of Thermoplastic Composite Materials

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“…Figure 3 shows an increase in degree of crystallinity with the addition of nanotubes of either type into iPP matrix, thus confirming that the nanotubes act as nucleation sites. The results are in agreement with some of the reports [14, 15] but in contradiction to a few others [16, 17], which showed either decrease or insignificant changes in the degree of crystallinity. Results of X‐ray diffraction (XRD) studies presented below are in conformity with the results of DSC measurements presented here.…”

Section: Resultssupporting

confidence: 90%

Effect of phenol functionalized carbon nanotube on mechanical, dynamic mechanical, and thermal properties of isotactic polypropylene nanocomposites

Thomas

Girei

Al-Juhani

et al. 2011

Polymer Engineering & Sci

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In this work, multiwall carbon nanotubes (MWCNT) were functionalized with phenol and characterized by using Fourier transform infrared spectroscopy (FTIR). Isotactic polypropylene (iPP)/MWCNT composites of both the unfunctionalized and functionalized MWCNT were prepared by melt blending in a miniextruder at different loadings of nanotubes (i.e., 0.1, 0.25, 1.0, and 5.0 wt%). The tensile properties of the composites were found to increase with increase in nanotube loading with a maximum in Young's modulus being achieved at 1.0 wt% loading of phenol functionalized MWCNT. The differential scanning calorimetry (DSC) studies reveal the nucleating effect of MWCNT on the crystallization of iPP. Percentage crystallinity was found to increase on phenol functionalization of MWCNT. Results of X‐ray diffraction studies of the composites are in conformity with that of DSC studies. Dynamic mechanical studies reveal that the functionalized MWCNT causes many fold increase in the storage modulus, and the effect is pronounced in the case of functionalized MWCNT. POLYM. ENG. SCI. 2012. © 2011 Society of Plastics Engineers

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“…Alternatively, the interfacial energy between polymers and CNTs can be reduced by chemical functionalization of CNTs; as a result, better dispersion of CNTs can be achieved 20, 21. The interaction between polymer and CNTs can be strengthened when CNTs are covalently integrated into the polymer matrix through grafting onto polymer chains or using compatibilizers 22–25…”

Section: Introductionmentioning

confidence: 99%

Preparation, structure and properties of thermoplastic olefin nanocomposites containing functionalized carbon nanotubes

Zhao

Deng

et al. 2011

Polymer International

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The morphology and properties of multiwalled carbon nanotube modified polypropylene (PP)/ethylene–octene copolymer blends were studied. Polypropylene chains are covalently grafted onto the surface of carbon nanotubes (CNTs) in order to improve their interaction with the polymer matrix. It is observed that functionalization of CNTs improves their dispersion and increases the interfacial bonding between CNTs and polymer matrix. The functionalized CNTs are selectively distributed in the continuous polypropylene phase. The size of the dispersed elastomer phase decreases after the addition of CNTs. Functionalized CNTs act as a nucleating agent and increase the crystallinity of the polypropylene. More importantly, an important increase in impact strength, stiffness and toughness can be achieved through introducing functionalized CNTs. Copyright © 2011 Society of Chemical Industry

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Synthesis of polypropylene wrapped carbon nanotubes composite via in situ graft method with maleic anhydride

Cited by 8 publications

References 24 publications

Effect of –COOH Functionalized Carbon Nanotubes on Mechanical, Dynamic Mechanical and Thermal Properties of Polypropylene Nanocomposites

Effect of –COOH Functionalized Carbon Nanotubes on Mechanical, Dynamic Mechanical and Thermal Properties of Polypropylene Nanocomposites

Effect of phenol functionalized carbon nanotube on mechanical, dynamic mechanical, and thermal properties of isotactic polypropylene nanocomposites

Preparation, structure and properties of thermoplastic olefin nanocomposites containing functionalized carbon nanotubes

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