Preparation and characterization of high‐performance poly(ether ether ketone) fibers with improved spinnability based on thermotropic liquid crystalline poly(aryl ether ketone) copolymer

Abstract

High-performance poly(ether ether ketone) (PEEK) fibers were prepared by melt-spinning in the presence of thermotropic liquid crystalline poly(aryl ether ketone) copolymer (FPAEKLCP). The rheological and mechanical properties, birefringence, orientation, and crystallization of the resulting PEEK/FPAEKLCP fibers were characterized by using a melt flow indexer, capillary rheometer, single fiber electronic tensile strength tester, polarized light microscopy (PLM), and wide-angle X-ray diffraction (WAXD), respectively. The results indicate that the melt viscosity of PEEK significantly reduced by introducing FPAEKLCP, followed by the improvements in the spinnability and the quality of as-spun fibers. The tensile properties of PEEK/FPAEKLCP fibers mainly depend on the content of FPAEKLCP, drawing temperature, drawing ratio, and annealing processes. Moreover, the tensile strength and modulus of PEEK/FPAEKLCP fibers are obviously higher than those of neat PEEK fibers under the same processing conditions. This should be attributed to an enhancement in the orientation and crystallization of PEEK compounded with FPAEKLCP.

Study on mechanical properties of unidirectional continuous carbon fiber‐reinforced PEEK composites fabricated by the wrapped yarn method

“…Fiber grade PEEK particles ( MI = 22 g/10 min; T g = 145°C; T m = 337°C, were supplied by Changchun Jilin University Super Engineering Plastics Research Co. China and used for melt spinning. The details of melt spinning were previously reported . The fabricated PEEK fibers had a linear density of 18 and 23 tex, and the average diameter of the monofilament was 23 μm and 36 filaments in number.…”

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

“…The details of spinning have been reported previously. 23 The prepared PEEK fibers had a linear density of 23 tex, a monofilament diameter of 23 μm, and 36 filaments in number. The schematic diagram of the spinning machine is shown in Figure 2.…”

Preparation and properties of a novel, high-performance polyether ether ketone fabric

“…PEEK fibers were prepared by melt spinning method in Engineering Research Center of High Performance Plastics, Ministry of Education, Jilin University. 27,28 The high-temperature experimental spinning equipment and the stretch machine used for the production of the PEEK fibers were developed by Beijing Paigu Equipment Company in China. The PEEK/FPAEKLCP blend granules were dried at 120°C for 8 h before spinning.…”