Effects of molecular weight on the dynamic mechanical properties and interfacial properties of carbon fiber fabric-reinforced polyetherketone cardo composites

Ma, Yan; Ying, Bi; Zhang, Xingdi; Wang, Daming; Dang, Guodong; Zhou, Hongwei; Chen, Chunhai

doi:10.1177/0954008315622260

Cited by 7 publications

(4 citation statements)

References 21 publications

(24 reference statements)

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“…The CFM/PEEK composites displayed clear improvements both in tensile and in flexural strength, because strong interfacial adhesion between the SCFs and the PEEK matrix was achieved by the introduction of PI sizing, thereby providing better load transfer from the matrix to fiber. 30 Similarly, Young’s and flexural modulus of the composites were evaluated, and the results are listed in Table 4. As shown in Figure 6(b), compared with the CF/PEEK composites, Young’s modulus and flexural modulus of CFM/PEEK composites exhibited higher values at 5.2 and 8.2 GPa, corresponding to an increase of 15.6% and 26.2%, respectively.…”

Section: Resultsmentioning

confidence: 99%

PEEK composites with polyimide sizing SCF as reinforcement: Preparation, characterization, and mechanical properties

Wang

Jiao

et al. 2019

High Performance Polymers

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In this work, the surface modification of short carbon fibers (SCFs) using polyimide (PI) as a sizing agent was conducted and fully characterized, and SCF-reinforced polyether ether ketone (PEEK) composites were obtained by extrusion and injection molding. The surface characteristics of the PI-coated SCFs were evaluated using scanning electron microscopy and X-ray photoelectron spectroscopy. The results indicated that a uniform PI sizing layer was formed on the surfaces of the SCFs. Thermogravimetric analysis results demonstrated that PI-coated SCFs had better thermal stability than commercial SCFs. The tensile strength and flexural strength of the PI-coated SCF/PEEK composites showed improvements of 11.8% and 16.6% compared with the commercial cases, which were attributed to the PI sizing treatment effectively improving the interfacial adhesion between the SCF and the PEEK matrix. Dynamic mechanical analysis and the morphologies of tensile fracture surfaces suggested better interfacial adhesion between the fibers and the PEEK matrix, which were in good agreement with the mechanical properties. Due to the convenient processing of PI sizing as well as the effectively improved mechanical properties of the composites, the PI-sizing methodology has great potential application in the field of fiber-reinforced high-temperature engineering plastics composites.

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Section: Resultsmentioning

confidence: 99%

PEEK composites with polyimide sizing SCF as reinforcement: Preparation, characterization, and mechanical properties

Wang

Jiao

et al. 2019

High Performance Polymers

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“…The peak height of tanδ curve, which represent Tg, is directly proportional to ability of laminates to dissipate energy as a result of highly degree of molecular motion at the interface 29 . The Tg of laminates depends on the mobility of the chains at the interface and interaction between fiber and matrix 30 . Table 2 show that F1 has highest peak height of tanδ curve than F1NBR composites.…”

Section: Dynamic Mechanical Properties (Dma)mentioning

confidence: 99%

Effect of Epoxy Resin Concentration on Some Mechanical Properties of Carbon Fabric/ Nitrile Rubber Reinforced Composites

Halim¹,

Kholy²,

Naguib³

et al. 2019

JCCS

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Carbon fiber reinforced polymer composites (CFRP) are widely used in variety of applications such as flexible aerodynamic surfaces on aircraft, under water flexible vehicles, flexible robotic skeletons and engineering applications. Epoxy resins (ER) are usually employed as the polymeric matrix, in which the fabric laminates are embedded. Although Carbon fabric/resin composites possess outstanding mechanical performance and good process-ability, however, ER are relatively brittle which causes a major problem for the performance of the final structure. In our present study, a woven carbon fiber reinforced polymer composite, with nitrile-butadiene rubber (NBR) as the polymeric matrix were fabricated by hand layup method followed by compression molding. Different concentrations (5,10,15 and 20 part per hundred, phr) of an ER were added to the NBR formulations and compared with similarly-processed CFRP reference material produced without NBR. Various static and dynamic mechanical properties were examined experimentally. The results revealed that CFRP composite containing 10 phr epoxy resin showed significant improvement in the impact strength and flexural strength due to the good energy absorbing of NBR. In addition, tensile strength decreased while elongation at break percentage increased because of high strain capability and elastic recovery of the nitrile rubber. The dynamic mechanical test results such as tan delta, glass

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“…On the one hand, the molecular weight will affect the viscosity of the thermoplastic binder for the composite material and, on the other hand, affect the mechanical properties of CFRP. The authors of [17] studied the influence of the molecular weight of the thermoplastic polyester-cardo resin (PEK-s) on the thermal, mechanical, and interfacial properties of the composite. The research results showed that composites with a higher molecular weight of the polymer have higher mechanical properties due to a higher level of interfacial adhesion.…”

Section: Introductionmentioning

confidence: 99%

Influence of Molecular Weight on Thermal and Mechanical Properties of Carbon-Fiber-Reinforced Plastics Based on Thermoplastic Partially Crystalline Polyimide

Vaganov,

Simonova,

Romasheva

et al. 2023

Polymers

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For the first time, a study of the influence of the molecular weight of the thermoplastic partially crystalline polyimide R-BAPB on the thermophysical and mechanical properties of carbon plastics was presented. The molecular weight of polyimide was determined using the method of light scattering and the study of the intrinsic viscosity of polyamic acid solutions. To obtain CFRPs, the uniform distribution of polyimide powder on continuous carbon fibers via electrostatic spraying and further hot calendering and pressing were applied. The study of the structure of the obtained carbon plastics via scanning electron microscopy has shown that the growth of the molecular weight of polyimide prevents the impregnation of carbon fiber with the introduced polyimide. Moreover, an increase in the molecular weight of polyimide leads to a rise in glass transition and thermal decomposition temperatures up to 590 °C, while the degree of crystallinity of CFRP falls. Nonetheless, raising the molecular weight from 22,000 to 70,000 g/mol of a binder polymer improves the interlayer fracture toughness G1C by more than five times.

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Effects of molecular weight on the dynamic mechanical properties and interfacial properties of carbon fiber fabric-reinforced polyetherketone cardo composites

Cited by 7 publications

References 21 publications

PEEK composites with polyimide sizing SCF as reinforcement: Preparation, characterization, and mechanical properties

PEEK composites with polyimide sizing SCF as reinforcement: Preparation, characterization, and mechanical properties

Effect of Epoxy Resin Concentration on Some Mechanical Properties of Carbon Fabric/ Nitrile Rubber Reinforced Composites

Influence of Molecular Weight on Thermal and Mechanical Properties of Carbon-Fiber-Reinforced Plastics Based on Thermoplastic Partially Crystalline Polyimide

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