▎ 摘　　要

NOVELTY - Preparing single-component fibers involves drying and mixing polybutylene terephthalate slices with poly(methyl methacrylate) (PMMA) powder, hydrophilic substance, graphene, polycaprolactam, isophthalic acid, aromatic hydroxy acid under the protection of nitrogen. The mixture formed by irradiation is obtained by an electron beam device with a dose rate of 8 kilogray per second. The mixture is added to a twin-screw granulation extruder for granulation and extrusion to obtain mixed granules, and then the obtained particles are subjected to hot melt extrusion, after metering, spinning, cooling, oiling, traction, to obtain porous polybutylene terephthalate fiber polyethylene terephthalate wire, which is subjected to balancing, bundling, oil-immersed water bath drawing, steam drawing, oiling, cutting and relaxation heat setting to obtain PBT fiber. USE - Method for preparing single-component fibers. ADVANTAGE - The method enables to prepare single-component fibers which is helps to fill the deficiencies of related research, provides data and research basis for the further development and utilization of PBT functional fiber. DETAILED DESCRIPTION - Preparing single-component fibers involves drying and mixing polybutylene terephthalate slices with PMMA powder, hydrophilic substance, graphene, polycaprolactam, isophthalic acid, aromatic hydroxy acid uder the protection of nitrogen. The mixture formed by irradiation is obtained by an electron beam device with a dose rate of 8 kilogray per second. The mixture is added to a twin-screw granulation extruder for granulation and extrusion to obtain mixed granules, and then the obtained particles are subjected to hot melt extrusion, after metering, spinning, cooling, oiling, traction, to obtain porous PBT fiber POY wire, which is subjected to balancing, bundling, oil-immersed water bath drawing, steam drawing, oiling, cutting and relaxation heat setting to obtain PBT fiber. The triethylamine, chloroform and 4-dimethylaminopyridine (DMAP) are added to the reaction dish, after ultrasonic dispersion for 30 minutes, placed the reaction dish under ice bath, and slowly added 0.8 gram bromoisobutyryl bromide to the system. The reaction dish is placed at room temperature and magnetically stir for 48 hours. The reaction product is suction filtered, repeatedly washed with chloroform, and suction filtered multiple times to obtain a loose PBT fiber atom transfer radical polymerization (ATRP) initiator. The product is dried in a vacuum drying oven at 40 degrees C for 12 hours to obtain the ATRP initiator of PBT composite fiber. The ATRP initiator, copper bromide, polybutylene terephthalate fiber, N, N, N, N', N''-pentamethyldiethylenetriamine, and acetate fiber are added into the reaction tank, and then added copper wire. The reaction tank is repeatedly frozen and evacuated by liquid nitrogen for 3 times, then sealed, and placed in a 70 degrees C oil bath for 10 hours. The product is placed in a vacuum drying oven at 60 degrees C for 24 hours to obtain polybutylene terephthalate composite fibers.