Study on polyetheretherketone prepreg manufactured by aqueous system of powder impregnation

Abstract

Aiming to improve safety and stability in manufacturing poly-ether-ether-ketone (PEEK) prepreg by powder impregnation, the aqueous system combined with surfactant and thickener was proposed in this paper. Based on surface tension method, the effects of surfactants and concentration on dispersion efficiency of PEEK powders were studied, and concentration of surfactants was determined. The effect of thickener concentration on suspension stability was analyzed, and ingredients of aqueous system were optimized by mechanical tests. The results show that, dispersion efficiency would reach maximum when surfactant concentration at critical micelle concentration, but not affected by the type of surfactant. Network association mechanism of thickener could improve stability of suspension, which holding time was increased from 40 min to 4 h. The good dispersion effect and long times stable system improved the coefficient variation of resin mass fraction, which was reduced from 7% to 4%. Compared with circulating system, the mechanical test results showed that the tensile strength kept unchanged, but interlayer properties were associated with carbon residue mass, the lower the residue carbon mass, the higher the interlayer strength retention rate, the optimized ingredient was Aerosol OT 75%E solution. Aqueous system has characteristics of safety, green, and low cost, which fits the demands of industrial production of prepreg.

Theoptical‐thermalmodeling of carbon black filled glass fiber reinforced poly‐ether‐ether‐ketone in laser assisted tape winding

“…The ILSS of the 0.5%CB and 4%CB remain at 50% of the hot press samples, which are consistent with majority of previously published works 33,37,42–44 . (the mechanical performance of hot press samples can be referred from previous work of 39 ). Furthermore, the microstructure of the 4%CB demonstrates good bonding between each layers, with an even dispersion of fibers and resin, thereby confirming the suitability of the customized heating strategy.…”

“…Therefore, the present research group has conducted extensive studies on the application of GF/PEEK in LATW. Paper of 39 beginning with a discussion and development of a stable and continuous GF/PEEK prepreg manufactured, and subsequently enhancing the laser absorption characteristics of the GF/PEEK prepreg by filling carbon black (CB) nanoparticles 40 . In the present paper, a finite element analysis of the LATW process is performed in order to examine the optical‐thermal performances of three typical CB‐loaded GF/PEEK prepregs with various laser absorption capabilities, namely: (i) 0.5%CB (prepregs with incomplete absorption), (ii) 2.74%CB (object from theoretical calculations, with complete single‐layer absorption), and (iii) 4%CB (prepregs with complete near‐surface absorption).…”

Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites

“…Usually, the resin matrix for laminating requires prior pre-polymerization to prepare a B-stage resin, or the addition of a suitable amount of thickener to increase the melt viscosity. 12,34 A proper melt viscosity (1-5 Pa s) can ensure resin flow during molding while reducing overflow. 9,35 Thereby, it is beneficial to control the resin content and prepare parts with uniform resin distribution.…”