Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites

Song, Meiyun; Wang, Xiaoqing; Du, Ran; Zhou, Zhen; Li, Yongming; Li, Guoping; Luo, Yunjun

doi:10.1039/d2ra01450e

Cited by 4 publications

(6 citation statements)

References 32 publications

(38 reference statements)

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“…These LCP resins are highly sought-after in various applications, including electronic equipment connectors, automotive components, electrical appliances, and coatings. 14 Due to their exceptional rheological and ignition resistance, LCP is frequently employed in blending with engineering plastics such as PPS, polyetherimide (PEI), and PEEK. 15 Consequently, the mechanical properties of these composites can be significantly enhanced by incorporating LCP in PPS.…”

Section: Introductionmentioning

confidence: 99%

“…LCP resins, recognized for their excellent fluidity and superior mechanical properties, effectively enhance the mechanical performance of polymers by increasing crystallinity. These LCP resins are highly sought‐after in various applications, including electronic equipment connectors, automotive components, electrical appliances, and coatings 14 . Due to their exceptional rheological and ignition resistance, LCP is frequently employed in blending with engineering plastics such as PPS, polyetherimide (PEI), and PEEK 15 .…”

Section: Introductionmentioning

confidence: 99%

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Enhanced mechanical properties of polyphenylene sulfide and liquid crystal polymer composites by interfacial bonding capacity of graft‐modified graphene oxide and glass fibers

Xu,

Guan,

et al. 2024

Polymers for Advanced Techs

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The aim of this study is to broaden the potential applications of polyphenylene sulfide (PPS) by incorporating graphene oxide (GO)‐grafted glass fiber (GF) to enhance the mechanical properties of liquid crystal polymer (LCP)/PPS composites. The surface of GF was modified using γ‐Aminopropyltriethoxysilane (KH550), allowing for the grafting of GO. Subsequently, GO‐GF/LCP/PPS composites were prepared through extrusion injection molding. The properties of the composites were evaluated using scanning electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. The findings indicate that the interfacial adhesion between GF and composites is significantly improved with the addition of GO, The mass fractions of GO used were 0.1%, 0.5%, and 0.7%. The incorporation of GO‐grafted GF proves to be an effective approach in enhancing the tensile and flexural strengths of LCP/PPS composites. Additionally, a reduction in wear volume and tribological coefficient is observed compared to composites without GO‐treated GF. Notably, when the GO content is 0.5 wt%, the mechanical properties of the composites show significant improvement, with a 50% increase in impact strength compared to the composite without GO, and a decrease in friction coefficient from 0.28 to 0.22.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties of polyphenylene sulfide and liquid crystal polymer composites by interfacial bonding capacity of graft‐modified graphene oxide and glass fibers

Xu,

Guan,

et al. 2024

Polymers for Advanced Techs

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“…Furthermore, the structure-function relationships between "surface microstructure of CF-interfacial interaction between PEEK matrix and CF-molding process and macroscopic properties of final CF/PEEK composites" are discussed to realize the efficient preparation of highperformance composites. 19,20 In this paper, the factors affecting the interfacial properties of CF/PEEK composites, the surface functionalization modification methods of CF and the design & synthesis of interfacial compatibilizer are reviewed. The research progress and related academic achievements in interfacial strengthening and additive manufacturing technology of CF/PEEK composites are emphatically discussed.…”

Section: Introductionmentioning

confidence: 99%

Interfacial strengthening and processing of carbon fibers reinforced poly(ether‐ether‐ketone) composites: A mini‐review

Dang,

Sun,

Liu

2024

Polymer Composites

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Carbon fibers/poly(ether‐ether‐ketone) (CF/PEEK) composites have the advantages of excellent impact resistance, good moisture and heat resistance, ultra‐short molding cycle and recyclable secondary processing. Therefore, the investigation on CF/PEEK composites is an important development direction of low‐cost and high‐performance polymer‐based composites. However, due to the strong surface inertness of CF and the poor interface compatibility between CF and PEEK matrix, the mechanical properties of CF/PEEK composites are low. Moreover, PEEK matrix has the high melting point and large viscosity, making the processing of CF/PEEK composites very difficult. In this paper, the factors affecting the interfacial properties of CF/PEEK composites, the surface functionalization modification methods of CF, and the design & synthesis of interfacial compatibilizer are reviewed. The research progress and related academic achievements in interfacial strengthening and additive manufacturing technology of CF/PEEK composites are emphatically discussed. Finally, the development trends and application prospects of CF/PEEK composites are summarized.Highlights CF/PEEK composite is the key material for industry and infrastructure. The factors affecting the interface interaction between PEEK and CF. The methods of interface strengthening for CF/PEEK composites. The additive manufacturing technology of CF/PEEK composites. The development trends and application of CF/PEEK composites.

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“…There, the 3D-printed PPS/LCP samples exhibit a tensile strength of 108.5 MPa and a Young’s modulus of 25.9 GPa. A combination of a carbon fiber (CF)-reinforced PEEK with a thermotropic LCP is studied in [ 32 ]. There, it is found that strong pi–pi interactions between the aromatic rings of PEEK and LCP are beneficial since they improve the crystallization behavior of PEEK and the processability of PEEK/CF composites [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of 3D-Printed Liquid Crystalline Polymers with Low and High Melting Temperatures

Johann,

Wolf,

Bonten

2023

Materials

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Additive manufacturing allows for the production of complex components using various types of materials such as plastics, metals and ceramics without the need for molding tools. In the field of high-performance polymers, semi-crystalline polymers such as polyetheretherketone (PEEK) or amorphous polymers such as polyetherimide (PEI) are already successfully applied. Contrary to semi-crystalline and amorphous polymers, thermotropic liquid crystalline polymers (LCPs) do not change into an isotropic liquid during melting. Instead, they possess anisotropic properties in their liquid phase. Within the scope of this work, this special group of polymers was investigated with regard to its suitability for processing by means of fused filament fabrication. Using an LCP with a low melting temperature of around 280 °C is compared to processing an LCP that exhibits a high melting temperature around 330 °C. In doing so, it was revealed that the achievable mechanical properties strongly depend on the process parameters such as the direction of deposition, printing temperature, printing speed and layer height. At a layer height of 0.10 mm, a Young’s modulus of 27.3 GPa was achieved. Moreover, by employing an annealing step after the printing process, the tensile strength could be increased up to 406 MPa at a layer height of 0.15 mm. Regarding the general suitability for FFF as well as the achieved uniaxial mechanical properties, the LCP with a low melting temperature was advantageous compared to the LCP with a high melting temperature.

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Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites

Abstract: Here a liquid crystal polymer (LCP) was introduced into a PEEK/CF system as a new solution to simultaneously promote processing and mechanical performance of PEEK/CF and other polymer-based composites.

Cited by 4 publications

References 32 publications

Enhanced mechanical properties of polyphenylene sulfide and liquid crystal polymer composites by interfacial bonding capacity of graft‐modified graphene oxide and glass fibers

Enhanced mechanical properties of polyphenylene sulfide and liquid crystal polymer composites by interfacial bonding capacity of graft‐modified graphene oxide and glass fibers

Interfacial strengthening and processing of carbon fibers reinforced poly(ether‐ether‐ketone) composites: A mini‐review

Mechanical Properties of 3D-Printed Liquid Crystalline Polymers with Low and High Melting Temperatures

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