Studies on the composites produced from co-weaved poly ether ether ketone and glass fiber fabric

Abstract

The extruded poly ether ether ketone (PEEK) and glass fiber yarns were used to obtain the co-weaved hybrid fiber fabrics. Compression molding technique was employed to obtain the glass-PEEK composites from the hybrid fiber fabric. Composites having different thickness values of 3.3, 3.6, and 4.5 mm have been fabricated by varying the number of layers (15, 17, and 20 layers) of co-weaved fabrics. The mechanical properties such as flexural strength and inter laminar shear strength as a function of number of layers of fabric have been evaluated. Low-velocity (2.1 m/s) repeated drop weight impact tests were carried out on the fabricated composites at 5 and 10 J incident energy. The number of drops to failure was observed to be more in 5 J compared to 10 J incident energy. Effects of frequency on the viscoelastic behavior were investigated using dynamic mechanical analyzer by sweeping at different frequency and temperature ranges. Master curves were generated by time-temperature superposition of the experimental data at a reference temperature of 156 C. The dielectric properties such as relative permittivity and loss tangent of glass-PEEK composites was found to be less dependent on the frequency (8-13 GHz) and temperature (50-300 C), which is an indication for its use in typical aerospace applications such as radomes.

Bending property and fracture behavior of continuous glass fiber-reinforced PEEK composites fabricated by the wrapped yarn method

“…This method enables to wet the fiber with the matrix. However, this method also has some defects, Fujihara et al 15 indicated that the matrix powders can be easily dislodged from the reinforcing filaments, unless a heat-resistant adhesive—that is used for letting the matrix powders stick to the surface of fiber—is used but that will affect the performance of composites. (4) Co-woven method 16 –19 …”

Comparison of the impact damage resistance of non-hybrid and intra-ply hybrid carbon/E-glass/polypropylene non-crimp thermoplastic composites

“…It was stated that the high impact properties achieved may be attributed to the modulus of yarn systems and better fiber–matrix adhesion. 25…”

“…Some detailed studies were performed by researchers about the mechanical and impact properties of hybrid composites. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Swolfs et al 8 reviewed the basic mechanisms of hybrid effects to obtain the optimal design of hybrid composites. Strait et al 9 stated that there were no effects of stacking sequence, and reinforcement form was observed in terms of energy after peak load in carbon fiber-reinforced thermoplastic toughened by the hybrid epoxy composites.…”

“…It was stated that the high impact properties achieved may be attributed to the modulus of yarn systems and better fibermatrix adhesion. 25 It can be seen from the literature that a lot of studies have been performed about the mechanical and impact properties of some designed hybrid composites. In most of these studies, the thermoplastic fibers are used for toughness purpose in the thermoset-based composites.…”

Influence of processing conditions on tensile property of continuous glass fiber–reinforced PEEK composites fabricated by the co-wrapped yarn method

“…Many workers 9 –18 carried out investigations on continuous glass fiber–reinforced polypropylene composites (CGF/PP) from commingled yarn. However, there are very few reports 19–20 on CGF/PEEK composites from commingled yarn, since the high melt viscosity of PEEK and high molding temperature, make it difficult to process. However, these difficulties cannot undermine the advantages of PEEK.…”