Polypropylene nanocomposites reinforced with low weight percent graphene nanoplatelets

Bafana, Adarsh; Yan, Xingru; Wei, Xin; Patel, Manisha; Guo, Zhanhu; Wei, Suying; Wujcik, Evan K.

doi:10.1016/j.compositesb.2016.10.048

Cited by 95 publications

(62 citation statements)

References 27 publications

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“…Summarizing the role of GNP's on GNP/ABS/PC and GNP/ABS/PP blends, it can be concluded that they show a very strong effect on PP whereas their effect action at the ABS/PC interface is also significant. Increase of T onset and T peak of pure PP by the incorporation of graphene nanoplatelets has also been observed by others researchers [14,18,55], who attributed this behavior to the interactions between graphene nanoplatelets and polymeric chains. Liang et al [56] found that T 5% (corresponds to 5% loss) of PP composites with three types of GNPs, with lateral dimension <10, 0.5-20, 10-50 μm, increased, respectively, from 407.2 to 408.3, 411.1 and 413.6 C and the values of the T p increased, respectively, from 454.2 to 454.6, 455.7, and 457.3 C. Moreover, GNPs improved the activation energy of PP composites, and the activation energy increased with increasing the GNP lateral dimension due to the increase of mass barrier effect [56].…”

Section: Resultssupporting

confidence: 78%

“…Increase of T onset and T peak of pure PP by the incorporation of graphene nanoplatelets has also been observed by others researchers , who attributed this behavior to the interactions between graphene nanoplatelets and polymeric chains. Liang et al found that T 5% (corresponds to 5% loss) of PP composites with three types of GNPs, with lateral dimension <10, 0.5–20, 10–50 μm, increased, respectively, from 407.2 to 408.3, 411.1 and 413.6°C and the values of the T p increased, respectively, from 454.2 to 454.6, 455.7, and 457.3°C.…”

Section: Resultssupporting

confidence: 76%

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Thermal, Mechanical, and dielectric properties of Injection Molded Graphene Nanocomposites Based on ABS/PC and ABS/PP Blends

2018

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In this research, graphene nanocomposites of poly(acrylonitrile‐butadiene‐styrene)/polycarbonate (ABS/PC) and ABS/polypropylene (ABS/PP) blends were prepared by melt blending and their thermal and mechanical properties were studied. The incorporation of graphene into ABS/PC and ABS/PP blends caused a significant decrease of their melt flow index values. Although graphene led to reduction of onset degradation temperature (Tonset) and maximum degradation rate temperature (Tpeak) of ABS/PC blends, and mainly of pure PC, the obtained residue from thermogravimetric analysis showed an increase. The thermal degradation of PC phase, in PC‐rich blends, was completed at higher temperatures. In ABS/PP blends, the effect of graphene was an outstanding increase of Tonset and Tpeak in the case of pure PP, while increasing the residue at all proportions. Regarding the Young's modulus, in ABS/PC blends the result of the addition of graphene was dependent on the blend composition. In ABS/PP hybrids, the elastic modulus increased by the incorporation of graphene and this increase, reached anabout 43% in pure PP. The addition of graphene to pure ABS, pure PP and their blend 50/50 w/w resulted in an increasing trend of the dielectric constant (κ′), whereas the loss factor (tanδ) was similar in non‐reinforced and graphene‐reinforced samples, within the entire range of the examined frequencies. POLYM. COMPOS., 40:E1662–E1672, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 78%

Section: Resultssupporting

confidence: 76%

Thermal, Mechanical, and dielectric properties of Injection Molded Graphene Nanocomposites Based on ABS/PC and ABS/PP Blends

2018

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“…GnP increases ( t 1/2 ) −1 . Hence, it acts as a nucleating agent, which has also been reported in the literature . However, the literature does not adequately explain this result.…”

Section: Resultsmentioning

confidence: 68%

“…The related published work on crystallization deals with i ‐PP‐CNT, i ‐PP‐montmorillonite and i ‐PP‐calcium carbonate, i ‐PP‐exfoliated graphite, and i ‐PP‐GnP nanocomposites . We focus, as summarized above, on nucleating an agent‐free i ‐PP‐GnP nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

Non‐isothermal crystallization of Ziegler Natta i‐PP‐graphene nanocomposite: DSC and new model prediction

et al. 2020

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Crystallization occurs in processing i-PP-GnP nanocomposites, and these nanocomposites have the potential to replace traditional fillers and be used to fabricate advanced materials and technology. Therefore, this subject was comprehensively investigated by applying a recent crystallization model, non-isothermal DSC experiments, Raman spectroscopy, and WAXRD. The multi-layer GnPinduced nucleation and the crystal growth rates were modelled. The overall modelling effort generated new insights, results, and explanations. This study confirmed and elucidated, or refuted several published conclusions. It has also been reported that the present model can pursue differences in catalyst-mediated i-PP backbone defects (stereo and regio) by simulating the relative crystallization profile and determining the crystallization kinetic triplet (n, k o , and E a ). The multiple roles played by GnP were underscored, which exceed what the related literature currently reports. The Raman and XRD work revealed the interaction between GnP and i-PP. The shear-induced dispersion of GnP that occurs during extrusion significantly affected i-PP crystal size distribution. The present approach can also assess the effects of catalyst type and structure, and backbone defect types and their distribution on the non-isothermal crystallization of, in general, polyolefin blends and nanocomposites.

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“…The loss factor (tan θ) is usually used to evaluate the damping property of materials [53][54][55][56]. The temperature at which the loss factor curve reaches a maximum is often recorded as the T g .…”

Section: Resultsmentioning

confidence: 99%

Strengthened epoxy resin with hyperbranched polyamine-ester anchored graphene oxide via novel phase transfer approach

Zhang

Liang

Wang

et al. 2017

Adv Compos Hybrid Mater

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This work investigated the mechanical properties of epoxy resin composites embedded with graphene oxide (GO) using a novel two-phase extraction method. The graphene oxide from water phase was transferred into epoxy resin forming homogeneous suspension. Hyperbranched polyamine-ester (HBPE) anchored graphene oxide (GO HBPE ) was prepared by modifying GO with HBPE using a neutralization reaction. Fourier transform-infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM) showed that the HBPE was successfully grafted to the GO surface. The mechanical properties and dynamic mechanical analysis (DMA) of the composites demonstrated that GO HBPE played a critical role in mechanical reinforcement owing to the layered structure of GO, wrinkled topology, surface roughness and surface area ascending from various oxygen groups of GO itself, and the inarching of HBPE and the reaction among GO, HBPE, and epoxy resin. The transferred GO HBPE /epoxy resin composites showed 69.1% higher impact strength, 129.1% more tensile strength, 45.3% larger modulus, and 70.8% higher strain compared to that of cured neat epoxy resin. The glass transition temperature (Tg) of GO HBPE /epoxy resin composites was increased from 135 to 141°C and their damping capacity was also improved from 0.71 to 0.91. This study provides guidelines for the fabrication of strengthened polymer composites using phase transfer approach.

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Polypropylene nanocomposites reinforced with low weight percent graphene nanoplatelets

Cited by 95 publications

References 27 publications

Thermal, Mechanical, and dielectric properties of Injection Molded Graphene Nanocomposites Based on ABS/PC and ABS/PP Blends

Thermal, Mechanical, and dielectric properties of Injection Molded Graphene Nanocomposites Based on ABS/PC and ABS/PP Blends

Non‐isothermal crystallization of Ziegler Natta i‐PP‐graphene nanocomposite: DSC and new model prediction

Strengthened epoxy resin with hyperbranched polyamine-ester anchored graphene oxide via novel phase transfer approach

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