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CN-121806222-B - High-toughness bending-resistant AOC connector and preparation method thereof

CN121806222BCN 121806222 BCN121806222 BCN 121806222BCN-121806222-B

Abstract

The invention relates to the technical field of AOC connectors, and discloses a high-toughness bending-resistant AOC connector and a preparation method thereof; the optical cable component comprises an optical fiber, an aramid yarn layer, a polyethylene outer sheath and a weaving layer, wherein polyethylene, 4-hydroxystyrene grafted polyethylene, 1,3, 5-tris (4-benzoxazinyl) benzene and the like are mixed, extruded, granulated and heat treated to obtain the polyethylene outer sheath, the 1,3, 5-tris (4-benzoxazinyl) benzene contains a plurality of oxazine ring cross-linking polymerization sites, and the oxazine ring cross-linking polymerization sites react with a phenolic hydroxyl structure of the grafted polyethylene, so that the crosslinking degree of molecular chains in the polyethylene is increased, the molecular chains of the polyethylene are not easy to slide relatively under the action of external force, the deformation resistance of the external force is increased, and the polyethylene outer sheath has good strength and high toughness and bending resistance, thereby being beneficial to improving the bending resistance and the protection performance of the AOC connector optical cable.

Inventors

  • ZHU KAI
  • TU JIANBIN
  • HAN YUFENG
  • LIN WEIFENG
  • LU SHAOCHENG
  • DOU WENCHAO
  • WU TIANTIAN
  • SHEN ZHIFENG
  • ZHU CONGWEI

Assignees

  • 江苏亨通光电股份有限公司
  • 广东亨通光电科技有限公司

Dates

Publication Date
20260508
Application Date
20260306

Claims (9)

  1. 1. A preparation method of a high-toughness bending-resistant AOC connector is characterized in that the AOC connector comprises an optical cable assembly and an AOC connector, wherein the optical cable assembly comprises an optical fiber, an aramid yarn layer, a polyethylene outer protective layer and a braiding layer; The preparation method of the polyethylene outer sheath comprises the steps of mixing polyethylene, 4-hydroxystyrene grafted polyethylene, 1,3, 5-tris (4-benzoxazine phenyl) benzene, an antioxidant and a halogen-free flame retardant, extruding by a screw extruder, granulating, then placing in an oven for heat treatment, and cooling to obtain the polyethylene outer sheath; The structural formula of the 1,3, 5-tris (4-benzoxazine phenyl) benzene is as follows: ; The mass ratio of the polyethylene to the 4-hydroxystyrene grafted polyethylene to the 1,3, 5-tris (4-benzoxazine phenyl) benzene to the antioxidant to the halogen-free flame retardant is 100 (0.3-1) (2-5) (0.1-0.2) (20-30).
  2. 2. The method of manufacturing a high-toughness bending-resistant AOC connector according to claim 1, wherein the braid is woven from fibers, the fibers are one or more of polyester fibers and nylon fibers, and the cable assembly has an inner jacket, which is a crosslinked polyethylene layer.
  3. 3. The method of manufacturing a high-toughness bending-resistant AOC connector according to claim 1, wherein the antioxidant includes antioxidant 1076 and the halogen-free flame retardant includes any one or combination of aluminum hydroxide, ammonium polyphosphate, and zinc borate.
  4. 4. The method for manufacturing a high-toughness bending-resistant AOC connector according to claim 1, wherein the temperature of each section of the screw extruder is 155-190 ℃ and the screw rotating speed is 70-120r/min.
  5. 5. The method of manufacturing a high toughness bend resistant AOC connector according to claim 1, wherein the heat treatment is performed for 2-3 hours at 150-160 ℃ and then for 2-3 hours at 200-210 ℃.
  6. 6. The method for preparing the high-toughness bending-resistant AOC connector according to claim 1, wherein the preparation method of the 1,3, 5-tris (4-benzoxazinyl) benzene is characterized in that a sodium hydroxide aqueous solution is dropwise added into 1, 4-dioxane, the pH is regulated to 9.5-10, formaldehyde aqueous solution, 1,3, 5-tris (4-aminophenyl) benzene and phenol are added, the molar ratio of formaldehyde to 1,3, 5-tris (4-aminophenyl) benzene to phenol is (5.1-6): 1 (3-3.6), the mixture is heated to 90-100 ℃, stirring, condensing and refluxing reaction is carried out for 6-10 hours, the solution is decompressed and concentrated, a product is washed by water, and then recrystallized in a mixed solvent of isopropanol and dichloromethane, so that the 1,3, 5-tris (4-benzoxazinyl) benzene is obtained.
  7. 7. The method for preparing the high-toughness bending-resistant AOC connector according to claim 1, wherein the preparation method of the 4-hydroxystyrene grafted polyethylene is characterized in that the polyethylene, the 4-hydroxystyrene and the dicumyl peroxide are mixed, placed in a screw extruder, subjected to melt grafting for 8-12min at 190-200 ℃ at the screw rotating speed of 30-50r/min, extruded, added into dimethylbenzene, heated and stirred, poured into a mixed solvent of acetone and ethyl acetate, filtered, washed to precipitate and dried to obtain the 4-hydroxystyrene grafted polyethylene.
  8. 8. The method for preparing the high-toughness bending-resistant AOC connector according to claim 7, wherein the mass ratio of polyethylene to 4-hydroxystyrene to dicumyl peroxide is 100 (2-5) (0.1-0.3).
  9. 9. A high-toughness bending-resistant AOC connector obtainable by the method of any one of claims 1 to 8.

Description

High-toughness bending-resistant AOC connector and preparation method thereof Technical Field The invention relates to the technical field of AOC connectors, in particular to a high-toughness bending-resistant AOC connector and a preparation method thereof. Background The AOC active optical cable connector is a connector based on an optical fiber transmission technology and is widely applied to equipment which is in need of high-speed data transmission, such as industrial printers, medical equipment, measuring instruments, industrial robots, factory automation and the like. The AOC connector mainly comprises a connector and an optical cable, wherein an outer sheath in the optical cable mainly plays a role in protecting optical fibers, and the outer sheath is mainly made of polyethylene, polyvinyl chloride and the like, wherein the polyethylene has the advantages of low cost, high flexibility, good corrosion resistance and the like, and is very widely applied. However, polyethylene has low strength, and is easy to crack and break when subjected to external force or long-term bending, so that the protective performance of the sheath layer is affected. The polybenzoxazine is a high-performance resin material, has high toughness, high strength and high-temperature resistance, and has important application in the aspects of epoxy resin, polyolefin, phenolic resin and the like. Patent CN118272004B discloses a polyethylene adhesive and a preparation method thereof, which takes polyethylene, maleic anhydride grafted polyethylene, silicon-containing benzoxazine and the like as raw materials, and the prepared polyethylene material has good performances of stretching, high temperature resistance and the like, but the patent does not improve the bending strength, bending resistance and the like of the polyethylene. Disclosure of Invention The invention solves the technical problem that the strength of the AOC connector optical fiber is low. The technical scheme of the invention is that the high-toughness bending-resistant AOC connector comprises an optical cable assembly and an AOC connector, wherein the optical cable assembly comprises an optical fiber, an aramid yarn layer, a polyethylene outer protective layer and a weaving layer, and the preparation method of the polyethylene outer protective layer comprises the following steps: (1) Dropwise adding a sodium hydroxide aqueous solution into 1, 4-dioxane, adding an aqueous solution of formaldehyde, 1,3, 5-tris (4-aminophenyl) benzene and phenol, concentrating the solution under reduced pressure after reaction, washing the product with water, and then recrystallizing in a mixed solvent of isopropanol and dichloromethane to obtain 1,3, 5-tris (4-benzoxazine phenyl) benzene. (2) Mixing polyethylene, 4-hydroxystyrene and dicumyl peroxide, performing melt grafting in a screw extruder, adding the product into dimethylbenzene, heating and stirring, pouring the solution into a mixed solvent of acetone and ethyl acetate, filtering, washing the precipitate with acetone and ethyl acetate, and drying to obtain the 4-hydroxystyrene grafted polyethylene. (3) Mixing polyethylene, 4-hydroxystyrene grafted polyethylene, 1,3, 5-tris (4-benzoxazine phenyl) benzene and an antioxidant, extruding by a screw extruder, granulating, then placing in an oven for heat treatment, and cooling to obtain the polyethylene outer protective layer. Preferably, the braiding layer is braided by fibers, and the fibers are one or more of polyester fibers and nylon fibers. Preferably, the cable assembly may also have an inner jacket layer, which is a crosslinked polyethylene layer. Preferably, the aqueous solution of sodium hydroxide is added dropwise to adjust the pH to 9.5-10 in (1). Preferably, the molar ratio of formaldehyde, 1,3, 5-tris (4-aminophenyl) benzene and phenol in (1) is (5.1-6): 1 (3-3.6). Preferably, the reaction in (1) is stirred at 90-100℃under reflux for 6-10h. Preferably, the mass ratio of polyethylene, 4-hydroxystyrene and dicumyl peroxide in the (2) is 100 (2-5) to 0.1-0.3. Preferably, the temperature in the melt grafting in (2) is 190-200 ℃, the time is 8-12min, and the screw rotating speed is 30-50r/min. Preferably, the mass ratio of the polyethylene to the 4-hydroxystyrene grafted polyethylene to the 1,3, 5-tris (4-benzoxazine phenyl) benzene to the antioxidant to the halogen-free flame retardant in the step (3) is 100 (0.3-1), 2-5, 0.1-0.2 and 20-30. Preferably, the antioxidant in (3) comprises antioxidant 1076. Preferably, the halogen-free flame retardant in (3) comprises any one or combination of aluminum hydroxide, ammonium polyphosphate and zinc borate. Preferably, the temperature of each section of the screw extruder in the step (3) is 155-190 ℃, and the screw rotating speed is 70-120r/min. Preferably, the heat treatment in (3) is carried out at 150-160℃for 2-3 hours and then at 200-210℃for 2-3 hours. The invention has the beneficial technical effects that the polyethylene wit