Studies for Wear Property Correlation for Carbon Fabric-Reinforced PES Composites

Abstract

Polyethersulfone (PES) composites were developed with carbon fabric (CF). Cold remote nitrogen oxygen plasma (CRNOP) treatment was employed to the CF to incorporate functional groups and promote fibermatrix adhesion. This study includes the effect of PES melt flow index (MFI) on the wettability of CF and its influence on fretting wear performance. Evaluations of fretting wear properties of composites led to the conclusion that the CRNOP treatment proved beneficial to enhance performance properties significantly. Polymer MFI and treatment to CF proved to be the decisive parameters for controlling performance of composites apart from operating parameters. Perforations on the treated carbon fiber, evidently observed by FESEM, improved the fiber-matrix adhesion, and hence the performance properties. Artificial neuron network (ANN) was used for prediction of the wear behavior of composites.

Synergistic effects of short glass fiber/short carbon fiber hybrids on the mechanical properties of polyethersulfone composites

“…As for the moduli of the SCF/SGF/PES hybrid composites measured, which agree well with the value predicted by the ROM, and no obvious positive or negative synergistic effect is seen. This observation is similar to that in our previous work on hybrid SCF/SGF/PP composites [30]. It is known that carbon fiber has high tensile strength and Young's modulus but is expensive, while glass fiber is much cheaper and has a tensile strain of as high as 3-5.54% [10,11].…”

“…For the positive synergistic effects here, qualitative explanations are attempted below. It is well known that the interfacial shear stress at short fiber ends has the maximum value . Since the carbon fiber has a higher stiffness than the glass fiber and the mean aspect ratios of carbon fibers are smaller than those of glass fibers, the shear stress at the carbon fiber ends would have the higher maximum value in terms of the stress transfer theory .…”

“…It is well known that the interfacial shear stress at short fiber ends has the maximum value [30]. Since the carbon fiber has a higher stiffness than the glass fiber and the mean aspect ratios of carbon fibers are smaller than those of glass fibers, the shear stress at the carbon fiber ends would have the higher maximum value in terms of the stress transfer theory [30]. In the beginning of a mechanical testing, there are no cracks in the hybrid composites when the applied load (P1) is quite low, see Fig.…”

Carbon fiber reinforced thermoplastic composites from acrylic polymer matrices: Interfacial adhesion and physical properties

“…Because, the room temperature is higher than the T g of the polypropylene (around 0°C). Moreover, aromatic thermoplastic polymers, such as polycarbonate [16,17], polybutylene terephthalate [18], polyethersulfone [19][20][21], polyetherimide [19,22,23], polyimide [24,25], polyetheretherketone [19,[26][27][28][29] and polyphenylenesulfide [30][31][32] have also been studied for high performance carbon fibers (CFs)/polymer matrix composites. In general, the aromatic polymers have high temperature resistance, high modulus of elasticity, and water resistance.…”

“…Meanwhile, it should be necessary to have good interfacial adhesion between CFs and matrix polymers for produce the high performance CFRTPs. Numerous methods for surface treatment of CFs, such as chemical modification [24,34], electrochemical oxidation [35][36][37][38][39][40][41], and plasma treatment [16,17,19,[21][22][23]29] have been studied to assure good interfacial adhesion. The basic idea of the CF surface modification is as follows.…”