Preparation and properties of polypropylene nanocomposites reinforced with exfoliated graphene

An, Ji-Eun; Jeon, Gil Woo; Jeong, Young Gyu

doi:10.1007/s12221-012-0507-z

Cited by 87 publications

(52 citation statements)

References 28 publications

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“…Though the effective dispersion of graphene throughout the polymer matrix is critical in order to take full advantage of the unique properties of graphene-based nanocomposites, predominant graphene aggregations is common in polyolefins because they tend to interact poorly with graphene-structured materials due to low interaction energy between them. In addition, the melt blending technique is widely used for the preparation of graphene/PP composites [34][35][36][37]. However, a generally poor dispersion of graphene and a risk of degradation of the polymer matrix often result from melt blending.…”

mentioning

confidence: 99%

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Wang

Jc²,

Sz³

2014

Express Polym. Lett.

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Conductive polymer composites have aroused wide interests from both academia and industry in the field of functional materials. Addition of diverse conducting fillers such as carbon black [1,2], graphite [3], and metal fiber or powder [4] into thermoplastic polymers through melt mixing is an effective approach to fabricate conductive composites. Because a great amount of the fillers, generally greater than 15 wt% [5], were required for the host polymer to become conductive, resulting in both poor processability and inferior mechanical properties, the practical applications of these conventional composites were largely restricted. On the other hand, commercial exploitation of isotactic polypropylene has been expanded rapidly due to its attractive characters of low cost, low weight, heat distortion above 100°C, and extraordinary versatility in terms of properties, applications and recycling. The introduction of nanoscopic fillers of high anisotropy enhances a wide range of performance of the polypropylene nanocomposites, such as mechanical, thermal and conductive properties, at a relatively small loading [6]. Graphite is a layered mineral composed of weakly bonded graphene sheets with a large aspect ratio. Abstract. Various surfactants of different molecular weights, including alkylamine, poly(oxypropylene) diamine (POP), and maleic anhydride grafted polypropylene (PPgMA) oligomers, were used for simultaneous funtionalization and reduction of graphite oxide (fGO). In this study, the effect of molecular weight and compatibility of the surfactants on the morphology and properties of the nanocomposites are reported. Wide-angle X-ray diffraction (WAXD) exhibited a definite interlayer thickness for GOA (alkylamine intercalated GO), however, the diffraction peaks were nearly suppressed for fGOs combining ODA with either POP (GOAP) or PPgMA (GOAE). The uniform dispersion of the fGO flakes in the polypropylene matrix resulted in the significant increase in both the degradation temperature and the crystallization temperature. A single characteristic melting peak of monoclinic (!) crystalline phase was observed from DSC traces, which was consistent with WAXD results. Dynamic mechanical analysis clearly indicated increase in both the storage modulus and the glass transition temperature of the nanocomposites due to the enhanced affinity between fGO and the polypropylene matrix. However, GOAP composite showed lower E" and T g than GOAE because POP is less compatible with the matrix than PPgMA oligomer. Dielectric analysis also showed significant increase in both dielectric permittivity and dielectric loss at low frequency regimes with GOAE showing maximum dielectric properties. The finely dispersed GOAE and its compatibility with polymer matrix manifested the interfacial polarization, which gave rise to much greater #" and #$ than other nanocomposites.

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confidence: 99%

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Wang

Jc²,

Sz³

2014

Express Polym. Lett.

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“…An increase of tensile strength and Young's modulus of PP by the incorporation of graphene nanoplatelets, have been reported by Milani et al , An et al , Achaby et al , and Polschikov et al . Liang et al found that Young's modulus of the composites increased, whereas the values of tensile yield strength and tensile fracture increased slightly with increasing the GNP weight fraction.…”

Section: Resultsmentioning

confidence: 69%

“…The addition of graphene to polypropylene (PP) matrix has been extensively studied by several authors. In order to prepare graphene/PP nanocomposites, in situ polymerization , solution blending , and melt mixing have been performed. Furthermore, graphene functionalized with octadecyl amine or graphene oxide (GO) functionalized with dodecyl amine , dodecyl (12C), octyl (8C), and propyl (3C) trimethoxysilane and p‐phenylenediamine (PPD) and cyanuric chloride , have also been incorporated to PP matrix, in order to improve its thermal stability, crystallinity, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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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“…In recent years, there have been many published reports describing the physical properties of polymeric composites containing carbon nanofillers [23][24][25][26][27][28][29][30]. There is still a lack of systematic studies presenting the impact of this kind of fillers on the thermal properties and flammability of polymeric composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of modified graphene and carbon nanotubes on the thermal properties and flammability of elastomeric materials

Rybiński

Anyszka

Imiela

et al. 2016

J Therm Anal Calorim

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The paper presents the test results of the effect of modified graphene and multi-wall carbon nanotubes on the thermal and mechanical properties and flammability of acrylic rubber and styrene-butadiene rubber. The rubbers were cross-linked with the use of organic peroxide. Based on the test results obtained by optic and AFM methods, a relationship between the surface morphology of the nanocomposites obtained was presented. By means of thermal analysis methods (TG, DTG, DTA) and a microcalorimeter, it has been found that the nanofillers used considerably increase the thermal stability and decrease flammability of the nanocomposites. The mechanical properties of the elastomeric materials obtained depend on the type and content of nanofiller.

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Preparation and properties of polypropylene nanocomposites reinforced with exfoliated graphene

Cited by 87 publications

References 28 publications

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

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

Effect of modified graphene and carbon nanotubes on the thermal properties and flammability of elastomeric materials

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