Effect of curing time on phase morphology and fracture toughness of PEK-C film interleaved carbon fibre/epoxy composite laminates

Yao, Jiawei; Zhang, Teng; Niu, Yifan

doi:10.1016/j.compstruct.2020.112550

Cited by 24 publications

(24 citation statements)

References 36 publications

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“…It could be found that the PEK-C resin and epoxy matrix formed dualphase structure after curing process. 24,32,33 The same dualphase structure was seen in the hackle resin surrounding the fibers, shown in Figure 8c1,c2). The dualphase was the main toughening mechanism in the thermoplastic/ thermosetting system, which dissipated the fracture energy and enhanced the crack propagation resistance.…”

Section: Sem Morphologysupporting

confidence: 55%

“…Firstly, a certain amount of PEK-C powder was dissolved in THF with the weight ratio of 12% through mechanical stirring and then PEK-C/THF solution was deposited onto the glass substrate of the coater machine (KW-4A, SETCAS Electronics, China) to form the film with the low-speed of 500 rpm for 30s and then highspeed of 1500 rpm for 30s. 24 Finally, the films were removed from the substrate with hot vapor.…”

Section: Pek-c Filmmentioning

confidence: 99%

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Influence of carbon nanotubes/polyetherketone‐cardo interlayer structure on mode II interlaminar fracture toughness of the interleaved carbon fiber reinforced epoxy composites

Sun

Yao

2022

J of Applied Polymer Sci

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Delamination is always considered as a threat to the resin matrix composite laminates due to the nonvisibility from the outside. Much effort on the interleaving toughening has been made to improve the interlaminar fracture toughness. The synergistic toughening effect of thermoplastic resin and carbon nanotubes (CNTs) has been the topic in the interleaving toughening. In this study, the influence of the hybrid structure between thermoplastic polyetherketone-cardo (PEK-C) and CNTs on the toughening efficiency was investigated. The mode II interlaminar fracture toughness was tested and the fracture surface was examined by scanning electron microscope. The results showed that the interlaminar structure was closely related with the interlayer structure and the synergistic toughening effect depended greatly on the hybrid structure.

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Section: Sem Morphologysupporting

confidence: 55%

Section: Pek-c Filmmentioning

confidence: 99%

Influence of carbon nanotubes/polyetherketone‐cardo interlayer structure on mode II interlaminar fracture toughness of the interleaved carbon fiber reinforced epoxy composites

Sun

Yao

2022

J of Applied Polymer Sci

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“…The weight fraction of PEK-C/THF and CNTs/PEK-C were 12% and 3%, respectively. 25 The mixture was deposited onto the glass substrate of coater machine, and the parameters were the low-speed of 500 rpm for 30 s and then high-speed of 1500 rpm for 30 s. The films were removed from the substrate with hot vapor after the volatilization of THF. 25 The preparation process of PEK-C/CNTs films, involving the preparation of CNTs dispersion and spin coating process, was depicted in Figure 2.…”

Section: Pek-c Film and Pek-c/cnts Filmmentioning

confidence: 99%

“…The fracture surface was mostly covered with the "scale-like" resin, as shown in Figure 9A2, which had been proved to be PEK-C monophase in our previous work. 25 The tearing up of ductile resin resulted in the "scale-like" morphology. 25 From the Figure 9B2, it could be seen that the layered structure, consisting of "scale-like" PEK-C monophase, PEK-C/EP dualphase structures, was formed in the interlaminar region (Figure 9B2), which was explained by the concentration gradient of PEK-C due to the interdiffusion of resin in curing process.…”

Section: Sem Morphologymentioning

confidence: 99%

Establishment of interlaminar structure and crack propagation in carbon fiber reinforced epoxy composites by interleaving CNTs/PEK‐C film

Yao

et al. 2022

Fatigue Fract Eng Mat Struct

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The synergistic combination of carbon nanotubes (CNTs) and thermoplastic (TP) resin has shown the large potential in the improvement of fracture resistance for the epoxy matrix composites using the interleaving toughening method in recent years. The hybrid structure of CNTs and TP resin in interlayers affects directly the interlaminar structure and the resultant crack propagation path. In this work, the CNTs and thermoplastic polyetherketone‐cardo (PEK‐C) were used to prepare the interlayer of different structures to interleave the carbon fiber reinforced epoxy composites and the influence of hybrid structure on the interlaminar structure and the fracture toughness was investigated. The results showed that compared with the PEK‐C/CNTs uniformly hybrid interlayer, the sandwich interlayer produced better toughening effect in mode I interlaminar fracture toughness (GIC). The GIC was improved by 138.1% via PEK‐C/CNTs/PEK‐C sandwich interlayer, while only 49.7% via PEK‐C/CNTs hybrid interlayer. The sandwich interlayer resulted in the formation of the multilayered structure in the interlaminar region, facilitating the tortuous crack propagation path.

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“…Since the RTM process requires a special resin with ultra-low viscosity, the widely used RTM resins are generally not toughened due to process problems. Actually, the interlaminar toughening method is a good strategy to solve the contradiction between the low viscosity of RTM resin and the high toughness of composite materials [3][4][5][6][7]. Thermoplastic resin films, powder, and thermoplastic resin nano-nonwoven fabrics can toughen the composites well and have been successfully applied to multiple aerospace composite parts [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Preforming of an Interlaminar Toughened Carbon Fiber/Bismaleimide Resin Composite by a Benzoxazine-Based Tackifier

Zhang

Li³

et al. 2022

Materials

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When thermoplastic resin-toughened carbon fiber (CF) composites are formed by liquid resin transfer molding (RTM), the conventional methods cannot be used to set the fabric preform, which affects the overall mechanical properties of the composites. To address this challenge, the benzoxazine-based tackifier BT5501A was designed, a preforming–toughening bifunctional CF fabric was fabricated by employing thermoplastic polyaryletherketone (PEK-C), and an aviation RTM-grade bismaleimide (BMI) resin was used as the matrix to study the effect of the benzoxazine-based tackifier on the thermal curing property and heat resistance of the resin matrix. Furthermore, the preforming and toughening effects on the bifunctional CF fabric reinforced the BMI resin composites. The tackifier BT5501A has good process operability. The application of this tackifier can advance the thermal curing temperature of the BMI resin matrix and decrease the glass transition temperature of the resin, compared to that of the pure BMI resin. Furthermore, when the tackifier was added into the CF/PEK-C/BMI composites, the obtained CF/BT5501A/PEK-C/BMI composites had comparable compression strength after impact, pit depth, and damage area, compared to the CF/PEK-C/BMI composites, while the tackifier endowed the fabric preform with an excellent preforming effect.

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Effect of curing time on phase morphology and fracture toughness of PEK-C film interleaved carbon fibre/epoxy composite laminates

Cited by 24 publications

References 36 publications

Influence of carbon nanotubes/polyetherketone‐cardo interlayer structure on mode II interlaminar fracture toughness of the interleaved carbon fiber reinforced epoxy composites

Influence of carbon nanotubes/polyetherketone‐cardo interlayer structure on mode II interlaminar fracture toughness of the interleaved carbon fiber reinforced epoxy composites

Establishment of interlaminar structure and crack propagation in carbon fiber reinforced epoxy composites by interleaving CNTs/PEK‐C film

The Preforming of an Interlaminar Toughened Carbon Fiber/Bismaleimide Resin Composite by a Benzoxazine-Based Tackifier

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