This invention proposes a high-strength and high-modulus PBO fiber and its preparation method, belonging to the field of high-performance fiber preparation.
The preparation method of high-strength and high-modulus PBO fiber in this invention includes the following steps:
1) batching, 2) prepolymerization, 3) material storage, 4) defoaming, 5) pre-filtration, 6) final polymerization, 7) spinning, 8) solidification, and 9) post-treatment.
Due to the high viscosity of the PBO spinning solution, which is prone to clogging equipment and pipelines, the equipment involved in this invention, such as the prepolymerization reactor, intermediate reactor, defoaming reactor, and twin-screw extruder, should be arranged compactly in spatial layout. At the same time, the reaction time and temperature should be strictly controlled to ensure the intrinsic viscosity of the material in each process and maintain process stability, thereby obtaining high-strength and high-modulus fibers.
Country Code: CN
Application Number: CN202311137846.5
