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CN-122011764-A - High-temperature-resistant creep-resistant polyphenylene sulfide composite material and preparation method thereof

CN122011764ACN 122011764 ACN122011764 ACN 122011764ACN-122011764-A

Abstract

The invention relates to the technical field of polyphenylene sulfide materials, and discloses a high-temperature-resistant creep-resistant polyphenylene sulfide composite material and a preparation method thereof, wherein the composite material comprises, by mass, 60-70 parts of polyphenylene sulfide, 30-40 parts of composite glass fibers, 2-4 parts of toughening agents, 0.2-0.6 part of antioxidants and 0.5-1 part of processing aids. The polyphenylene sulfide is used as a matrix, and the composite glass fiber, the toughening agent, the antioxidant and the processing aid are added, so that the prepared polyphenylene sulfide composite material has higher high-temperature-resistant creep-resistant performance and mechanical strength, and the compatibility of the composite glass fiber and the polyphenylene sulfide is better, so that the high-temperature-resistant creep-resistant performance and mechanical strength of the composite glass fiber are obviously enhanced.

Inventors

  • WANG GANG
  • GUO JIANMING

Assignees

  • 南京真宸科技有限公司

Dates

Publication Date
20260512
Application Date
20260224

Claims (10)

  1. 1. The high temperature resistant creep resistant polyphenylene sulfide composite material is characterized by comprising, by mass, 60-70 parts of polyphenylene sulfide, 30-40 parts of composite glass fibers, 2-4 parts of a toughening agent, 0.2-0.6 part of an antioxidant and 0.5-1 part of a processing aid; the composite glass fiber is obtained by mixing and reacting modified glass fiber, a silane coupling agent and glycidyl methacrylate; The modified glass fiber is prepared by synthesizing porous carbon from the surface of glass fiber, and then mixing and reacting the porous carbon with sulfonated lignin and silicon carbide whiskers.
  2. 2. The high temperature and creep resistant polyphenylene sulfide composite material according to claim 1, wherein the composite glass fiber is specifically prepared by the steps of: A1, adding glass fiber, rice hull powder and citric acid into ethanol, uniformly stirring, adding hydrochloric acid, filtering, washing, drying, placing in a tube furnace, adding potassium hydroxide solution for activation, introducing nitrogen, carbonizing at high temperature, cooling to room temperature, taking out, washing and drying to obtain porous carbon-loaded glass fiber; A2, adding sulfonated lignin and porous carbon-loaded glass fibers into deionized water, uniformly stirring, adding hydrochloric acid to adjust pH, stirring for reaction, adding silicon carbide whiskers, continuously stirring for reaction, cooling to room temperature, filtering, washing and drying to obtain modified glass fibers; A3, adding a silane coupling agent into ethanol and deionized water, uniformly stirring, adding modified glass fibers, stirring for reaction, cooling to room temperature, filtering, washing, and drying to obtain silanized modified glass fibers; And A4, adding the silanized modified glass fiber and glycidyl methacrylate into toluene, uniformly stirring, adding azodiisobutyronitrile, stirring and reacting for 2-3 hours at 75-85 ℃, cooling to room temperature, filtering, washing and drying to obtain the composite glass fiber.
  3. 3. The high-temperature-resistant creep-resistant polyphenylene sulfide composite material according to claim 2, wherein in the step A1, the mass ratio of the glass fiber, the rice hull powder, the citric acid, the ethanol, the hydrochloric acid and the potassium hydroxide solution is (2-3): 1-1.5): 0.5-0.7): 100-120): 1-1.2): 1.5-1.8.
  4. 4. The high-temperature-resistant creep-resistant polyphenylene sulfide composite material according to claim 2, wherein in the step A2, the mass ratio of the sulfonated lignin to the porous carbon-loaded glass fiber to the deionized water to the silicon carbide whiskers is (1-1.2): (2.3-2.5): (80-100): (1.2-1.4).
  5. 5. The high-temperature-resistant creep-resistant polyphenylene sulfide composite material according to claim 2, wherein in the step A3, the mass ratio of the silane coupling agent to the ethanol to the deionized water to the modified glass fiber is (0.8-1): (80-90): (30-35): (3-3.5).
  6. 6. The high-temperature and creep-resistant polyphenylene sulfide composite material according to claim 2, wherein in the step A4, the mass ratio of the silanized modified glass fibers, the glycidyl methacrylate, the toluene and the azobisisobutyronitrile is (2-2.5): 1-1.2): 60-80): 0.2-0.5.
  7. 7. The high temperature and creep resistant polyphenylene sulfide composite material according to claim 1, wherein the polyphenylene sulfide has a weight average molecular weight of 3-5 x 10 5 .
  8. 8. The high temperature and creep resistant polyphenylene sulfide composite material according to claim 1, wherein the toughening agent is selected from any one of butyl rubber, ethylene propylene rubber and styrene butadiene rubber.
  9. 9. The high temperature and creep resistant polyphenylene sulfide composite material according to claim 1, wherein the antioxidant is selected from any one of antioxidant 1010, antioxidant 1098 and antioxidant 168; The processing aid is selected from pentaerythritol stearate or silicone powder.
  10. 10. The high temperature and creep resistant polyphenylene sulfide composite material according to claim 1, wherein the preparation method of the polyphenylene sulfide composite material comprises the following steps: s1, pre-drying polyphenylene sulfide, mixing with a toughening agent, an antioxidant and a processing aid, and stirring to obtain a mixture; S2, adding the mixture from a feed hopper of an extruder, adding the composite glass fiber from a fiber port, and granulating through melt extrusion to obtain the polyphenylene sulfide composite material.

Description

High-temperature-resistant creep-resistant polyphenylene sulfide composite material and preparation method thereof Technical Field The invention relates to the technical field of polyphenylene sulfide materials, in particular to a high-temperature-resistant creep-resistant polyphenylene sulfide composite material and a preparation method thereof. Background Polyphenylene sulfide is fully called as polyphenylene sulfide, is a novel semi-crystalline high-performance thermoplastic resin, is formed by alternating arrangement of benzene rings and sulfur atoms, has the characteristics of high mechanical strength, high temperature resistance, chemical resistance, flame retardance, good thermal stability, excellent electrical property and the like, and is widely applied to the fields of electronic and electric appliances, automobile industry, aerospace, environmental protection chemical industry and 5G communication, however, the polyphenylene sulfide is easy to creep deformation under the action of continuous stress in a high-temperature environment for a long time, and the dimensional precision and the service life of parts are affected. The prepared polyphenylene sulfide composite material has higher high temperature resistance, mechanical strength and creep resistance by taking the polyphenylene sulfide as a matrix and adding the fiber filler, the toughening agent, the antioxidant and the processing aid, but has the defects of large brittleness and poor toughness due to the existence of a large number of benzene rings on a main chain of the polyphenylene sulfide, so that the application of the polyphenylene sulfide is greatly limited, the compatibility of the fiber filler and the polyphenylene sulfide is poor, and in addition, the single fiber filler has limited performance for improving the polyphenylene sulfide composite material, and the application range of the polyphenylene sulfide composite material is limited. Disclosure of Invention Technical problem to be solved Aiming at the defects of the prior art, the invention provides a high-temperature-resistant creep-resistant polyphenylene sulfide composite material and a preparation method thereof, and solves the problems of high brittleness, poor toughness and poor compatibility of fiber filler and polyphenylene sulfide. Technical proposal In order to achieve the above purpose, the present invention provides the following technical solutions: The high temperature resistant creep resistant polyphenylene sulfide composite material comprises the following raw materials, by mass, 60-70 parts of polyphenylene sulfide, 30-40 parts of composite glass fibers, 2-4 parts of toughening agents, 0.2-0.6 part of antioxidants and 0.5-1 part of processing aids; the composite glass fiber is obtained by mixing and reacting modified glass fiber, a silane coupling agent and glycidyl methacrylate; The modified glass fiber is prepared by synthesizing porous carbon from the surface of glass fiber, and then mixing and reacting the porous carbon with sulfonated lignin and silicon carbide whiskers. Further, the composite glass fiber is prepared by the following steps: A1, adding glass fiber, rice hull powder and citric acid into ethanol, uniformly stirring, adding hydrochloric acid, filtering, washing, drying, placing in a tube furnace, adding potassium hydroxide solution for activation, introducing nitrogen, carbonizing at high temperature, cooling to room temperature, taking out, washing and drying to obtain porous carbon-loaded glass fiber; A2, adding sulfonated lignin and porous carbon-loaded glass fibers into deionized water, uniformly stirring, adding hydrochloric acid to adjust pH, stirring for reaction, adding silicon carbide whiskers, continuously stirring for reaction, cooling to room temperature, filtering, washing and drying to obtain modified glass fibers; A3, adding a silane coupling agent into ethanol and deionized water, uniformly stirring, adding modified glass fibers, stirring for reaction, cooling to room temperature, filtering, washing, and drying to obtain silanized modified glass fibers; And A4, adding the silanized modified glass fiber and glycidyl methacrylate into toluene, uniformly stirring, adding azodiisobutyronitrile, stirring and reacting for 2-3 hours at 75-85 ℃, cooling to room temperature, filtering, washing and drying to obtain the composite glass fiber. Further, in the reaction process of A1, citric acid is used as a connecting agent and can be combined with hydroxyl groups contained on the surface of the glass fiber and oxygen-containing functional groups in the rice hull powder through chemical bonds, so that the rice hull powder is coated on the surface of the glass fiber, potassium hydroxide is used as an activating agent, high-temperature carbonization is carried out, the rice hull powder is heated and decomposed to form a compact carbon layer, potassium hydroxide molecules of the activating agent are decomposed, pore channels are formed on the