Comparative study of fullerenes and graphene nanoplatelets on the mechanical and thermomechanical properties of poly(ether ether ketone)

Wang, Pan; Ma, Ruixue; Wang, Yaming; Cao, Wei; Liu, Chuntai; Shen, Changyu

doi:10.1016/j.matlet.2019.04.092

Cited by 22 publications

(11 citation statements)

References 20 publications

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“…These factors contribute to optimizing the stress transfer from the PEEK matrix to the graphene fillers, inducing a strong reinforcing action of the GnP fillers [55][56][57]. The improvement in elongation at break (31%) and tensile strength (34%) at 1 wt.% of GnP loading demonstrated significantly better results than the previous reports [6,58,59]. In contrast, the samples PEEK-GnP3.0 with higher filler loading, i.e., 3.0 wt.% of GnPs, displayed~41% and~9% decrease in the maximum elongation at break and ultimate tensile strength, respectively.…”

Section: Thermomechanical Propertiesmentioning

confidence: 85%

Comprehensive Enhancement in Thermomechanical Performance of Melt-Extruded PEEK Filaments by Graphene Incorporation

et al. 2021

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A simple and scalable fabrication process of graphene nanoplatelets (GnPs)-reinforced polyether ether ketone (PEEK) filaments with enhanced mechanical and thermal performance was successfully demonstrated in this work. The developed PEEK–GnP nanocomposite filaments by a melt-extrusion process showed excellent improvement in storage modulus at 30 °C (61%), and significant enhancement in tensile strength (34%), Young’s modulus (25%), and elongation at break (37%) when GnP content of 1.0 wt.% was used for the neat PEEK. Moreover, the GnPs addition to the PEEK enhanced the thermal stability of the polymer matrix. Improvement in mechanical and thermal properties was attributed to the improved dispersion of GnP inside PEEK, which could form a stronger/robust interface through hydrogen bonding and π–π* interactions. The obtained mechanical properties were also correlated to the mechanical reinforcement models of Guth and Halpin–Tsai. The GnP layers could form agglomerates as the GnP content increases (>1 wt.%), which would decline neat PEEK’s crystallinity and serve as stress concentration sites inside the composite, leading to a deterioration of the mechanical performance. The results demonstrate that the developed PEEK–GnP nanocomposites can be used in highly demanding engineering sectors like 3D printing of aerospace and automotive parts and structural components of humanoid robots and biomedical devices.

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Section: Thermomechanical Propertiesmentioning

confidence: 85%

Comprehensive Enhancement in Thermomechanical Performance of Melt-Extruded PEEK Filaments by Graphene Incorporation

et al. 2021

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“…Commercial unreinforced PEEK (trade name: 450G) and its 30 wt% carbon and glass fiber reinforced grades (trade names: 450CA30 and 450GL30) were supplied by Victrex. The 450G had a molecular weight of about 1.0 × 10 5 g/mol. 17 The 450CA30 was polyacrylonitrile-based carbon fiber (with a diameter of 7 µm and length of ∼200 μm) reinforced PEEK composites, while the 450GL30 contained glass fibers with a diameter of 10 µm and length of ∼200 μm.…”

Section: Methodsmentioning

confidence: 99%

“…Poly(ether ether ketone) (PEEK) is a semicrystalline high-performance engineering plastics and exhibits excellent high-temperature resistant, mechanical, electrical, and tribological properties, being widely used in various applications such as aerospace, automotive and orthopedic implants. 1–8 Furthermore, glass fiber and carbon fiber are widely used to improve the properties of polymers including PEEK. 9–16…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the crystallization behavior and morphologies of carbon and glass fiber reinforced poly(ether ether ketone) composites

Wang

Lin

Wang

et al. 2020

Polymers and Polymer Composites

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This work aims to perform a systematic investigation on the crystallization behavior and morphologies of carbon and glass fiber reinforced PEEK. The nonisothermal and isothermal crystallization behavior was investigated by differential scanning calorimetry (DSC). The resultant morphologies were assessed by wide angle X-ray diffraction (WAXD), small angle X-ray scattering (SAXS), and polarized optical microscopy (POM) to provide details on spherulitic level, crystalline structure at unit cell, and lamellar levels. It was found that the crystallization ability of carbon fiber filled PEEK was better than that of neat PEEK, while the behavior of glass fiber filled PEEK was in an opposite trend. The incorporation of carbon fiber (or glass fiber) led to a looser packing of the unit cell or a less crystal perfection of PEEK but did not change its crystal form as well as its long period of lamellae. The isothermal crystallization kinetics was analyzed by the Avrami model, suggesting that the crystallization mechanism of carbon fiber filled PEEK was different from that of neat PEEK and its glass fiber filled composites. Nevertheless, the POM results showed that fiber-induced transcrystallization in PEEK matrix was not evidenced for either carbon or glass fiber filled PEEK. Finally, the effect of carbon and glass fiber on the crystallization of PEEK matrix was discussed to some extent.

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“…Therefore, many attempts have been made to fabricate PEEK/carbon composites by sintering, melt-blending, and injection-molding methods with the addition of nano llers such as CNT, graphene, GNP, and nano-clays [4][5][6][7][8]. However, nano llers like CNTs and GNPs tend to form agglomerates, and homogeneous dispersion of carbon becomes a challenging process [9,10]. Moreover, nanocomposites with GNP and CNT tend to suffer stress defects due to the sharp edges of nanoplatelets and void regions in the microstructure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Hot pressed PEEK/Graphite thin film laminate composites: Thermal properties and mechanical behavior

Sariyev

Abdikadyr

Baitikenov

et al. 2023

Preprint

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This work studies high-performance laminate composite materials made of graphite and poly(ether-ether-ketone) (PEEK). The composites were fabricated using a hot press method at a temperature below 310°C, and their structural, thermal, and mechanical properties were evaluated and discussed. SEM images of the laminate cross-section indicated a solid interfacial interaction between PEEK and graphite due to the high joining load. Thermogravimetric analysis (TGA) results showed that 3-layered PEEK/graphite/PEEK (PGP) and 5-layered PEEK/graphite/PEEK/graphite/PEEK (PG)2P composites had better thermal stability at high temperatures compared to neat PEEK. The mechanical properties tests showed that PGP had a higher Ultimate Tensile Strength (UTS) by 52% compared to neat graphite. However, adding another layer of graphite (PG)2P caused a decrease in UTS by 9.6% due to the higher volume fraction of graphite. The nanoindentation tests confirmed these findings: Young's modulus increased from 1.64 to 2.58 GPa, and the hardness increased from 0.164 to 0.178 GPa for PGP and (PG)2P, respectively. Additionally, XRD analysis indicated that the crystallinity of fabricated composites increased by 35.5% compared with pristine PEEK. The present study confirms that using PEEK and graphite sheets in composite fabrication through hot pressing improves thermal and mechanical properties.

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Comparative study of fullerenes and graphene nanoplatelets on the mechanical and thermomechanical properties of poly(ether ether ketone)

Cited by 22 publications

References 20 publications

Comprehensive Enhancement in Thermomechanical Performance of Melt-Extruded PEEK Filaments by Graphene Incorporation

Comprehensive Enhancement in Thermomechanical Performance of Melt-Extruded PEEK Filaments by Graphene Incorporation

Comparative study of the crystallization behavior and morphologies of carbon and glass fiber reinforced poly(ether ether ketone) composites

Hot pressed PEEK/Graphite thin film laminate composites: Thermal properties and mechanical behavior

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