High-performance thermoplastic polyarylene sulfide-based cable and preparation method thereof

Abstract

The invention discloses a high-performance thermoplastic polyarylene sulfide-based cable and a preparation method thereof, and belongs to the technical field of cables. The high-performance thermoplastic polyarylene sulfide-based cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of modified polyarylene sulfide resin, 20 to 30 parts of polyvinyl chloride, 15 to 25 parts of metallocene polyethylene, 18 to 22 parts of flame retardant, 3 to 4 parts of antioxidant, 4 to 6 parts of compatilizer and 1 to 2 parts of lubricant. The preparation method comprises the following steps: firstly, putting modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, a flame retardant, an antioxidant, a compatilizer and a lubricant into an extruder for mixing and melting, and carrying out water cooling, bracing and pelletizing to obtain a high-performance thermoplastic polyarylene sulfide-based cable material; then putting the cable material into an extruder for extrusion molding; and finally, spraying the polyvinylidene fluoride nano dispersion liquid on the surface of the cable, and sintering to form an anti-aging protective layer, thereby obtaining the high-performance thermoplastic polyarylene sulfide-based cable. According to the invention, the polyarylene sulfide resin is modified, so that the cable has excellent aging resistance, flame retardance and mechanical property and longer service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and in particular relates to a high-performance thermoplastic polyarylene sulfide-based cable and a preparation method thereof. Background Art

[0002] In the field of wire and cable materials, polyvinyl chloride (PVC) is widely used due to its low cost and excellent processing properties. However, its poor temperature resistance and reliance on harmful antimony compounds for flame retardancy restrict its application in high-temperature scenarios. While polyarylene sulfide (PAS) possesses excellent heat resistance and flame retardancy, it suffers from defects such as high melt viscosity, demanding processing temperatures, and poor toughness. While existing technologies can reduce costs by simply blending PAS / PVC, the poor interfacial compatibility between the two phases leads to a sharp drop in mechanical properties. Furthermore, traditional red phosphorus / aluminum hydroxide flame retardant systems are prone to moisture absorption, causing electrical performance degradation, and lack resistance to UV aging. Achieving a synergistic improvement in weather resistance, flame retardancy, and mechanical properties remains a technical bottleneck that urgently needs to be overcome in this field. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a high-performance thermoplastic polyarylene sulfide-based cable and a preparation method, which significantly improves the aging resistance and flame retardancy of the cable.

[0004] The first aspect of the present invention is to provide a high-performance thermoplastic polyarylene sulfide-based cable, which includes the following raw materials, calculated by weight: 40-50 parts of modified polyarylene sulfide resin, 20-30 parts of polyvinyl chloride, 15-25 parts of metallocene polyethylene, 18-22 parts of flame retardant, 3-4 parts of antioxidant, 4-6 parts of compatibilizer, and 1-2 parts of lubricant.

[0005] The metallocene polyethylene is added to the cable because of its high crystallinity, which can effectively absorb impact energy, inhibit crack propagation, and enhance the impact resistance, toughness and wear resistance of the cable.

[0006] In some embodiments, the flame retardant is an organophosphorus flame retardant or a nitrogen-phosphorus synergistic flame retardant; the antioxidant is selected from at least one of hindered phenol antioxidants and phosphite antioxidants; the compatibilizer is maleic anhydride grafted EVA or acrylate copolymer; and the lubricant is selected from at least one of oxidized polyethylene wax and calcium stearate.

[0007] In some embodiments, the modified polyarylene sulfide resin is prepared by the following steps: S1: Dispersing halloysite nanotubes and microencapsulated red phosphorus in ethanol at a mass ratio of 1:1 and drying to obtain a red phosphorus-halloysite composite; S2: dispersing the red phosphorus-halloysite complex in a buffer solution, adding dopamine hydrochloride, stirring, and drying to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: immersing the polydopamine-coated red phosphorus-halloysite composite material in an acetone solution containing dilauryl thiodipropionate and a benzotriazole ultraviolet absorber, and drying to obtain a dilauryl thiodipropionate-benzotriazole co-modified polydopamine-coated red phosphorus-halloysite composite material; S4: mixing a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, a polyarylene sulfide resin, maleic anhydride grafted SEBS and an oxidized polyethylene wax, and transferring the mixture to an extruder for melt extrusion to obtain a modified polyarylene sulfide resin.

[0008] It should be noted that halloysite nanotubes, with their hollow tubular structure, can serve as a carrier for red phosphorus (a flame retardant). The tube wall provides mechanical reinforcement, further enhancing the mechanical properties of the cable. Red phosphorus, loaded into the halloysite nanotube cavities and surface interstices, releases phosphates during thermal decomposition, capturing free radicals and interrupting the combustion chain reaction, thereby achieving a vapor-phase flame retardant effect. The polydopamine shell provides abundant phenolic hydroxyl and amino groups, improving interfacial compatibility with the resin and allowing for the adsorption of antioxidants. Dilauryl thiodipropionate and benzotriazole UV absorbers, acting as antioxidants, can be adsorbed to the polydopamine shell through hydrogen bonding and π-π interactions, achieving a long-lasting, sustained-release anti-aging effect. The present invention adopts a core-shell structure, wherein the core is a functional filler red phosphorus-halloysite composite, the shell is polydopamine, and dilauryl thiodipropionate-benzotriazole is loaded on the shell layer. Functional zoning achieves multi-purpose use of one material, and has the functions of flame retardancy, anti-aging, and mechanical support. The shell layer covers and blocks the contact of red phosphorus with external water and oxygen, maintaining long-term and stable flame retardancy. Traditional non-core-shell structures have relatively single functions, and the flame retardant easily absorbs moisture and becomes ineffective, and cannot meet the requirements of anti-aging and toughening. In addition, due to the high surface energy and polarity mismatch of the flame retardant, it is easy to form micron-level agglomerates in the resin-polyvinyl chloride matrix. The agglomerates easily become stress concentration points, causing the material to crack when subjected to stress.

[0009] Maleic anhydride grafted SEBS can improve interfacial compatibility. The anhydride groups of maleic anhydride grafted SEBS form hydrogen bonds or covalent bonds with the sulfide bonds of polyarylene sulfide resin. At the same time, its styrene-ethylene-butylene chain segments can enhance interfacial bonding with polyvinyl chloride and metallocene polyethylene through physical entanglement.

[0010] In some embodiments, in S1, the dispersion is performed by ultrasonic treatment at 300-350 W for 30-40 min, the drying temperature is 50-60° C., and the drying time is 12-14 h.

[0011] In some embodiments, in S2, the concentration of dopamine hydrochloride is 1-2 wt %, the stirring is magnetic stirring at room temperature for 20-26 h, the drying temperature is 60-70°C, and the drying time is 30-50 min; the buffer is selected from one of tris(hydroxymethyl)methylaminomethane hydrochloride buffer, sodium carbonate-sodium bicarbonate buffer, and boric acid-borax buffer.

[0012] In some embodiments, in S3, the immersion time is 30-50 min, the drying temperature is 60-70°C, the drying time is 30-40 min, the mass ratio of dilauryl thiodipropionate and the benzotriazole ultraviolet absorber is 1:1, and the concentration of the acetone solution containing dilauryl thiodipropionate and the benzotriazole ultraviolet absorber is 10-12 wt%.

[0013] In some embodiments, in S4, the mass ratio of the dilauryl thiodipropionate-benzotriazole co-modified polydopamine-coated red phosphorus-halloysite composite material, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax is 12-15:100:3-8:0.5-1.5.

[0014] The second aspect of the present invention is to provide a method for preparing a high-performance thermoplastic polyarylene sulfide-based cable, comprising the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt, and obtain high-performance thermoplastic polyarylene sulfide-based cable material through water cooling, strand drawing and pelletizing; Step 2: Put the high-performance thermoplastic polyarylene sulfide-based cable material into the extruder for extrusion molding; Step 3: Spray the polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0015] In some embodiments, in the first step, the melting temperature is 180-240° C.; in the second step, the extrusion temperature is 270-290° C., the line speed is 15-18 m / min, and the screw speed is 30-50 rpm.

[0016] In some embodiments, in the third step, the polyvinylidene fluoride nano-dispersion liquid is sprayed to a thickness of 3-7 μm, and the sintering temperature is 250-270°C.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention modifies the polyarylene sulfide resin to avoid the problems of pure PAS having strong rigidity, high brittleness and easy cable breakage. By introducing a polydopamine-coated red phosphorus-halloysite composite material modified with dilauryl thiodipropionate-benzotriazole, the flame retardant properties of red phosphorus, the mechanical support of halloysite nanotubes and the anti-aging performance of an anti-aging agent are utilized to achieve the purpose of significantly improving the anti-aging performance, high temperature resistance and toughness of the cable.

[0018] The high-performance thermoplastic polyarylene sulfide-based cable provided by the present invention is added with metallocene polyethylene, which can increase the toughness of the cable and improve the compatibility of PAS and PVC. In addition, the cable surface is sprayed with a polyvinylidene fluoride nano-dispersion. PVDF has excellent aging resistance, chemical corrosion resistance, high and low temperature resistance, insulation and ultraviolet radiation resistance. These properties can effectively protect the cable and extend its service life. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the embodiments.

[0020] Example 1 A high-performance thermoplastic polyarylene sulfide-based cable comprises the following raw materials, measured by mass: 45 parts of modified polyarylene sulfide resin, 25 parts of polyvinyl chloride, 20 parts of metallocene polyethylene, 20 parts of flame retardant, 4 parts of antioxidant, 5 parts of compatibilizer, and 2 parts of lubricant.

[0021] Among them, the flame retardant is an organophosphorus flame retardant (reagent source: Clariant Exolit OP ® 560); the antioxidant is a hindered phenol antioxidant (reagent source: BASF Irganox ® 1010); the compatibilizer is maleic anhydride grafted EVA; the lubricant is oxidized polyethylene wax.

[0022] The modified polyarylene sulfide resin is prepared by the following steps: S1: Halloysite nanotubes and microencapsulated red phosphorus were ultrasonically dispersed in ethanol at a mass ratio of 1:1 at 350 W for 35 min, and then dried at 55 °C for 13 h to obtain the red phosphorus-halloysite composite; S2: The red phosphorus-halloysite composite was dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 2 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 24 h, and then dried at 65 °C for 40 min to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: The polydopamine-coated red phosphorus-halloysite composite material was immersed in an 11 wt% acetone solution containing dilauryl thiodipropionate DLTDP (CAS No.: 123-28-4) and a benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 40 min, and then dried at 65°C for 35 min to obtain a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole. S4: Mix the polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax in a mass ratio of 14:100:5:1, transfer them to an extruder for melt extrude to obtain modified polyarylene sulfide resin (extruder temperature setting: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C).

[0023] The high-performance thermoplastic polyarylene sulfide-based cable is prepared by the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt at 200°C, and then water-cool, draw and pelletize to obtain high-performance thermoplastic polyarylene sulfide-based cable material; Step 2: High-performance thermoplastic polyarylene sulfide-based cable material is put into an extruder for extrusion molding at an extrusion temperature of 280°C, a line speed of 16 m / min, and a screw speed of 40 rpm; Step 3: Spray 5 μm thick polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter at 260°C to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0024] Example 2 A high-performance thermoplastic polyarylene sulfide-based cable comprises the following raw materials, measured by mass: 50 parts of modified polyarylene sulfide resin, 30 parts of polyvinyl chloride, 25 parts of metallocene polyethylene, 22 parts of flame retardant, 4 parts of antioxidant, 6 parts of compatibilizer, and 2 parts of lubricant.

[0025] Among them, the flame retardant is a nitrogen-phosphorus synergistic flame retardant (reagent source: Solvay Amgard ® NK); the antioxidant is a phosphite antioxidant (reagent source: BASF Irgafos ® 168); the compatibilizer is maleic anhydride grafted EVA; the lubricant is oxidized polyethylene wax.

[0026] The modified polyarylene sulfide resin is prepared by the following steps: S1: Halloysite nanotubes and microencapsulated red phosphorus were ultrasonically dispersed in ethanol at a mass ratio of 1:1 at 350W for 40 min, and then dried at 60°C for 14 h to obtain a red phosphorus-halloysite composite. S2: The red phosphorus-halloysite composite was dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 2 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 26 h, and then dried at 70 °C for 50 min to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: The polydopamine-coated red phosphorus-halloysite composite material was immersed in a 12 wt% acetone solution containing dilauryl thiodipropionate (CAS No.: 123-28-4) and a benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 50 min, and then dried at 70°C for 40 min to obtain a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate and benzotriazole; S4: Mix the polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax in a mass ratio of 15:100:8:1.5, transfer them to an extruder for melt extrude to obtain modified polyarylene sulfide resin (extruder temperature setting: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C).

[0027] The high-performance thermoplastic polyarylene sulfide-based cable is prepared by the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt at 240°C, and then water-cool, draw and pelletize to obtain high-performance thermoplastic polyarylene sulfide-based cable material; Step 2: High-performance thermoplastic polyarylene sulfide-based cable material is put into an extruder for extrusion molding at an extrusion temperature of 290°C, a line speed of 18 m / min, and a screw speed of 50 rpm; Step 3: Spray 7 μm thick polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter at 270°C to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0028] Example 3 A high-performance thermoplastic polyarylene sulfide-based cable comprises the following raw materials, measured by mass: 40 parts of modified polyarylene sulfide resin, 20 parts of polyvinyl chloride, 15 parts of metallocene polyethylene, 18 parts of flame retardant, 3 parts of antioxidant, 4 parts of compatibilizer, and 1 part of lubricant.

[0029] Among them, the flame retardant is an organophosphorus flame retardant (reagent source: Clariant Exolit OP® 560); the antioxidant is a hindered phenol antioxidant (reagent source: BASF Irganox ® 1010); the compatibilizer is an acrylate copolymer; the lubricant is calcium stearate.

[0030] The modified polyarylene sulfide resin is prepared by the following steps: S1: Halloysite nanotubes and microencapsulated red phosphorus were ultrasonically dispersed in ethanol at a mass ratio of 1:1 at 300 W for 30 min, and then dried at 50 °C for 12 h to obtain red phosphorus-halloysite composites; S2: The red phosphorus-halloysite composite was dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 1 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 20 h, and then dried at 60 °C for 30 min to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: The polydopamine-coated red phosphorus-halloysite composite material was immersed in a 10 wt% acetone solution containing dilauryl thiodipropionate (CAS No.: 123-28-4) and benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 30 min, and then dried at 60°C for 30 min to obtain a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate and benzotriazole; S4: Mix the polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax in a mass ratio of 12:100:3:0.5, transfer them to an extruder for melt extrude to obtain modified polyarylene sulfide resin (extruder temperature setting: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C).

[0031] The high-performance thermoplastic polyarylene sulfide-based cable is prepared by the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt at 180°C, and then water-cool, draw and pelletize to obtain high-performance thermoplastic polyarylene sulfide-based cable material; Step 2: High-performance thermoplastic polyarylene sulfide-based cable material is put into an extruder for extrusion molding at an extrusion temperature of 270°C, a line speed of 15 m / min, and a screw speed of 30 rpm; Step 3: Spray 3 μm thick polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter at 250°C to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0032] Example 4 A high-performance thermoplastic polyarylene sulfide-based cable comprises the following raw materials, calculated by weight: 42 parts of modified polyarylene sulfide resin, 28 parts of polyvinyl chloride, 18 parts of metallocene polyethylene, 20 parts of flame retardant, 5 parts of antioxidant, 5 parts of compatibilizer, and 2 parts of lubricant.

[0033] Among them, the flame retardant is a nitrogen-phosphorus synergistic flame retardant (reagent source: Solvay Amgard ® NK); the antioxidant is a phosphite antioxidant (reagent source: BASF Irgafos ® 168); the compatibilizer is maleic anhydride grafted EVA; the lubricant is oxidized polyethylene wax.

[0034] The modified polyarylene sulfide resin is prepared by the following steps: S1: Halloysite nanotubes and microencapsulated red phosphorus were ultrasonically dispersed in ethanol at a mass ratio of 1:1 at 320 W for 35 min, and then dried at 55 °C for 13 h to obtain red phosphorus-halloysite composite; S2: The red phosphorus-halloysite composite was dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 1.5 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 22 h, and then dried at 65 °C for 40 min to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: The polydopamine-coated red phosphorus-halloysite composite material was immersed in an 11 wt% acetone solution containing dilauryl thiodipropionate (CAS No.: 123-28-4) and a benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 35 min, and then dried at 65°C for 35 min to obtain a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate and benzotriazole; S4: Mix the polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax in a mass ratio of 14:100:6:1, transfer them to an extruder for melt extrude to obtain modified polyarylene sulfide resin (extruder temperature setting: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C).

[0035] The high-performance thermoplastic polyarylene sulfide-based cable is prepared by the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt at 220°C, and then water-cool, draw and pelletize to obtain high-performance thermoplastic polyarylene sulfide-based cable material; Step 2: High-performance thermoplastic polyarylene sulfide-based cable material is put into an extruder for extrusion molding at an extrusion temperature of 285°C, a line speed of 16 m / min, and a screw speed of 35 rpm; Step 3: Spray a 4 μm thick polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter it at 260°C to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0036] Example 5 A high-performance thermoplastic polyarylene sulfide-based cable comprises the following raw materials, calculated by weight: 48 parts of modified polyarylene sulfide resin, 24 parts of polyvinyl chloride, 20 parts of metallocene polyethylene, 21 parts of flame retardant, 4 parts of antioxidant, 4 parts of compatibilizer, and 2 parts of lubricant.

[0037] Among them, the flame retardant is an organophosphorus flame retardant (reagent source: Clariant Exolit OP ® 560); the antioxidant is a hindered phenol antioxidant (reagent source: BASF Irganox ® 1010); the compatibilizer is maleic anhydride grafted EVA; the lubricant is oxidized polyethylene wax.

[0038] The modified polyarylene sulfide resin is prepared by the following steps: S1: Halloysite nanotubes and microencapsulated red phosphorus were ultrasonically dispersed in ethanol at a mass ratio of 1:1 at 320 W for 30 min, and then dried at 60 °C for 14 h to obtain the red phosphorus-halloysite composite. S2: The red phosphorus-halloysite composite was dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 2 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 24 h, and then dried at 70 °C for 30 min to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: The polydopamine-coated red phosphorus-halloysite composite material was immersed in a 10 wt% acetone solution containing dilauryl thiodipropionate DLTDP (CAS No.: 123-28-4) and a benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 35 min, and then dried at 65°C for 35 min to obtain a polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole. S4: Mix the polydopamine-coated red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax in a mass ratio of 13:100:6:1, transfer them to an extruder for melt extrude to obtain modified polyarylene sulfide resin (extruder temperature setting: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C).

[0039] The high-performance thermoplastic polyarylene sulfide-based cable is prepared by the following steps: Step 1: Add modified polyarylene sulfide resin, polyvinyl chloride, metallocene polyethylene, flame retardant, antioxidant, compatibilizer and lubricant into an extruder, mix and melt at 220°C, and then water-cool, draw and pelletize to obtain high-performance thermoplastic polyarylene sulfide-based cable material; Step 2: High-performance thermoplastic polyarylene sulfide-based cable material is put into an extruder for extrusion molding at an extrusion temperature of 270°C, a line speed of 17 m / min, and a screw speed of 40 rpm; Step 3: Spray a 6 μm thick polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sinter it at 260°C to form an anti-aging protective layer to obtain a high-performance thermoplastic polyarylene sulfide-based cable.

[0040] Comparative Example 1 On the basis of Example 1, the modification of the polyarylene sulfide resin was omitted, and the conventional polyarylene sulfide resin with the same amount was used.

[0041] Comparative Example 2 On the basis of Example 1, the spraying of the polyvinylidene fluoride nano-dispersion liquid is omitted, that is, the anti-aging protective layer is not formed on the cable surface.

[0042] Comparative Example 3 The preparation steps were the same as those in Example 1, except that metallocene polyethylene was not added.

[0043] Comparative Example 4 On the basis of Example 1, the polydopamine-coated red phosphorus-halloysite composite material is a non-core-shell structure, and the specific steps are as follows: S1: Halloysite nanotubes and microencapsulated red phosphorus were dispersed in tris(hydroxymethyl)methylaminomethane hydrochloride buffer, 2 wt% dopamine hydrochloride was added, and the mixture was magnetically stirred at room temperature for 24 h, and then dried at 65 °C for 40 min to obtain a polydopamine-red phosphorus-halloysite composite material; S2: The polydopamine-red phosphorus-halloysite composite material was immersed in an 11 wt% acetone solution containing dilauryl thiodipropionate DLTDP (CAS No.: 123-28-4) and a benzotriazole ultraviolet absorber UV-327 (CAS No.: 3864-99-1) in a mass ratio of 1:1 for 40 min, and then dried at 65°C for 35 min to obtain a polydopamine-red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole. S3: Mix the polydopamine-red phosphorus-halloysite composite material co-modified with dilauryl thiodipropionate-benzotriazole, polyarylene sulfide resin, maleic anhydride grafted SEBS, and oxidized polyethylene wax in a mass ratio of 14:100:5:1, transfer the mixture to an extruder for melt extrusion to obtain a modified polyarylene sulfide resin (extruder temperature settings: feeding section 180°C, melting section 240°C, mixing section 260°C, die head 270°C). To demonstrate the excellent flame retardancy, aging resistance, and mechanical properties of the high-performance thermoplastic polyarylene sulfide-based cables provided by the present invention, the cables obtained in the Examples and Comparative Examples were subjected to flame retardancy, mechanical property, and aging resistance tests. The test results are shown in Table 1.

[0044] Flame retardant performance: Timing after ignition, the shorter the self-extinguishing time, the better the flame retardant effect.

[0045] The tensile strength was determined using the national standard GB / T 528-2009.

[0046] The tensile strength of the aged specimens was determined using the national standard GB / T 3512, Rubber (Vulcanized or Thermoplastic Rubber) — Accelerated Aging and Heat Resistance Tests in Hot Air (GB / T 528-2009), and the tensile strength retention was calculated; tensile strength retention = tensile strength after test / tensile strength before test × 100%.

[0047] The national standard GB / T 16585 “Test method for artificial weathering of vulcanized rubber (fluorescent ultraviolet lamp)” was used to determine the tensile strength of the aged specimens (GB / T 528-2009), and the tensile strength retention was calculated.

[0048] Table 1 By performing performance tests on the embodiments and comparative examples, it can be found that the flame retardant effect, mechanical properties and aging resistance of the embodiments are better than those of the comparative examples. Combined with comparative example 1, it can be found that the modified polyarylene sulfide resin can effectively improve the flame retardant properties of the cable. The flame retardant properties of red phosphorus, the mechanical support of halloysite nanotubes and the effect of the anti-aging agent greatly improve the weather resistance of the cable. Combined with comparative example 4, it can be seen that the polydopamine-coated red phosphorus-halloysite composite material in the modified polyarylene sulfide resin adopts a core-shell structure, which can not only greatly improve the flame retardancy and aging resistance of the cable, but also improve the mechanical properties of the cable, which is better than the traditional non-core-shell structure; combined with comparative example 2, it can be seen that the polyvinylidene fluoride nanodispersion can form an anti-aging protective layer on the surface of the cable, so that the cable can still maintain high mechanical properties after thermal aging and ultraviolet aging; combined with comparative example 4, it can be seen that metallocene polyethylene can not only improve the compatibility of PVC and PAS, but also effectively improve the toughness of the cable.

[0049] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A high-performance thermoplastic polyarylene sulfide-based cable, characterized in that: The composition comprises the following raw materials in parts by mass: 40-50 parts of modified polyarylene sulfide resin, 20-30 parts of polyvinyl chloride, 15-25 parts of metallocene polyethylene, 18-22 parts of flame retardant, 3-4 parts of antioxidant, 4-6 parts of compatibilizer and 1-2 parts of lubricant.

2. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 1, characterized in that: The flame retardant is an organic phosphorus flame retardant or a nitrogen-phosphorus synergistic flame retardant; the antioxidant is selected from at least one of hindered phenol antioxidants and phosphite antioxidants; the compatibilizer is maleic anhydride grafted EVA or acrylate copolymer; and the lubricant is selected from at least one of oxidized polyethylene wax and calcium stearate.

3. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 1, characterized in that: The modified polyarylene sulfide resin is prepared by the following steps: S1: Dispersing halloysite nanotubes and microencapsulated red phosphorus in ethanol at a mass ratio of 1:1, and drying to obtain a red phosphorus-halloysite composite; S2: dispersing the red phosphorus-halloysite composite in a buffer solution, adding dopamine hydrochloride, stirring, and drying to obtain a polydopamine-coated red phosphorus-halloysite composite material; S3: immersing the polydopamine-coated red phosphorus-halloysite composite material in an acetone solution containing dilauryl thiodipropionate and a benzotriazole ultraviolet absorber, and drying to obtain a dilauryl thiodipropionate-benzotriazole co-modified polydopamine-coated red phosphorus-halloysite composite material; S4: mixing the dilauryl thiodipropionate-benzotriazole co-modified polydopamine-coated red phosphorus-halloysite composite material, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax, transferring the mixture to an extruder for melt extrusion to obtain the modified polyarylene sulfide resin.

4. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 3, characterized in that: In the S1, the dispersion is carried out by ultrasonic treatment at 300-350 W for 30-40 min, the drying temperature is 50-60° C., and the drying time is 12-14 h.

5. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 3, characterized in that: In the S2, the concentration of dopamine hydrochloride is 1-2 wt %, the stirring is magnetic stirring at room temperature for 20-26 h, the drying temperature is 60-70° C., and the drying time is 30-50 min; the buffer solution is selected from one of tris(hydroxymethyl)methylaminomethane hydrochloride buffer, sodium carbonate-sodium bicarbonate buffer, and boric acid-borax buffer.

6. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 3, characterized in that: In the S3, the immersion time is 30-50 min, the drying temperature is 60-70° C., the drying time is 30-40 min, the mass ratio of dilauryl thiodipropionate and the benzotriazole ultraviolet absorber is 1:1, and the concentration of the acetone solution containing dilauryl thiodipropionate and the benzotriazole ultraviolet absorber is 10-12 wt%.

7. The high-performance thermoplastic polyarylene sulfide-based cable according to claim 3, characterized in that: In S4, the mass ratio of the dilauryl thiodipropionate-benzotriazole co-modified polydopamine-coated red phosphorus-halloysite composite material, polyarylene sulfide resin, maleic anhydride grafted SEBS and oxidized polyethylene wax is 12-15:100:3-8:0.5-1.

5.

8. A method for preparing a high-performance thermoplastic polyarylene sulfide-based cable according to any one of claims 1 to 7, characterized in that: The following steps are involved: The first step is to put the modified polyarylene sulfide resin, the polyvinyl chloride, the metallocene polyethylene, the flame retardant, the antioxidant, the compatibilizer and the lubricant into an extruder, mix and melt them, and obtain a high-performance thermoplastic polyarylene sulfide-based cable material through water cooling, strand drawing and pelletizing. Step 2: putting the high-performance thermoplastic polyarylene sulfide-based cable material into an extruder for extrusion molding; Step 3: spraying the polyvinylidene fluoride nano-dispersion on the surface of the cable extruded in the second step, and sintering to form an anti-aging protective layer to obtain the high-performance thermoplastic polyarylene sulfide-based cable.

9. The method for preparing a high-performance thermoplastic polyarylene sulfide-based cable according to claim 8, characterized in that: In the first step, the melting temperature is 180-240° C.; in the second step, the extrusion temperature is 270-290° C., the line speed is 15-18 m / min, and the screw speed is 30-50 rpm.

10. The method for preparing a high-performance thermoplastic polyarylene sulfide-based cable according to claim 8, characterized in that: In the third step, the polyvinylidene fluoride nano-dispersion liquid is sprayed with a thickness of 3-7 μm and a sintering temperature of 250-270°C.

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