A PPE / PPS composite material and preparation method thereof

Abstract

The invention relates to the field of polymer composite materials, in particular to a PPE / PPS composite material and a preparation method thereof. The composite material comprises the following components, measured in parts by weight: 40-60 parts of polyphenylene ether, 40-60 parts of polyphenylene sulfide, 10-30 parts of nylon-66, 5-10 parts of a compatibilizer, 0.5-2.5 parts of an antioxidant GA-80, and 10-30 parts of an inorganic filler. The compatibilizer comprises a long-chain alkyl isocyanate and a block copolymer grafted with maleic anhydride. The PPE / PPS composite material prepared by the invention has good mechanical properties, and the addition of nylon-66, the long-chain alkyl isocyanate and the acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride plays a positive role in improving the mechanical properties of the composite material.

Description

Technical Field

[0001] The invention relates to the field of polymer composite materials, in particular to a PPE / PPS composite material and a preparation method thereof. Background Art

[0002] Polyphenylene ether (PPE) has excellent electrical properties, thermal properties, resistance to boiling water, radiation resistance, dimensional stability and flame retardancy, but has the disadvantages of poor fluidity and difficulty in processing, so it appears in the market in the form of modified materials. Polyphenylene sulfide (PPS) has the advantages of high temperature resistance, corrosion resistance, radiation resistance, non-flammability, non-toxicity, excellent mechanical and electrical properties, and good dimensional stability of products. Using PPS to modify PPE can obtain a composite material with the advantages of PPS and PPE, such as high temperature resistance, chemical corrosion resistance, and high mechanical and electrical properties. It is widely used in motor wiring, circuit breakers, photovoltaic wiring, lithium batteries, and charging piles.

[0003] However, since polyphenylene ether resin is an amorphous polymer and polyphenylene sulfide resin is a crystalline polymer, the two lack compatibility, and it is technically difficult to directly blend them to form alloy properties. Therefore, it is necessary to select a suitable compatibilizer to increase their capacity. Summary of the invention

[0004] Purpose of the invention: In view of the above technical problems, the present invention proposes a PPE / PPS composite material and a preparation method thereof.

[0005] The technical solutions adopted are as follows:

[0006] A PPE / PPS composite material, characterized in that it comprises the following components in parts by weight:

[0007] 40-60 parts of polyphenylene ether, 40-60 parts of polyphenylene sulfide, 10-30 parts of nylon-66, 5-10 parts of compatibilizer, 0.5-2.5 parts of antioxidant GA-80, 10-30 parts of inorganic filler;

[0008] The compatibilizer includes long chain alkyl isocyanate and block copolymer grafted maleic anhydride.

[0009] Furthermore, the weight ratio of the long-chain alkyl isocyanate to the block copolymer grafted maleic anhydride is 1-5:1-5.

[0010] Furthermore, the long-chain alkyl isocyanate is prepared from an aromatic diisocyanate and an aromatic long-chain alkyl alcohol in a molar ratio of 1:1.

[0011] Furthermore, the aromatic diisocyanate is toluene diisocyanate and / or methylene diphenyl diisocyanate.

[0012] Furthermore, the structural formula of the aromatic long-chain alkyl alcohol is as follows:

[0013]

[0014] R is any one of phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, and pyrenyl, preferably phenyl;

[0015] n≥8, n can be selected as 8, 9, 10, 11, 12, the above are only examples and are not limiting.

[0016] Furthermore, the block copolymer grafted with maleic anhydride is any one or more combinations of acrylonitrile-styrene block copolymer grafted with maleic anhydride, acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride, and hydrogenated styrene-butadiene block copolymer grafted with maleic anhydride.

[0017] Furthermore, the inorganic filler includes nano-alumina and nano-sheet montmorillonite.

[0018] Furthermore, the weight ratio of the nano-alumina to the nano-sheet montmorillonite is 1-5:1-5.

[0019] The present invention also provides a method for preparing a PPE / PPS composite material: raw materials are weighed according to a weight ratio and mixed evenly, then melt-blended and extruded through a twin-screw extruder, cooled, pelletized and dried.

[0020] Furthermore, the temperature of the twin-screw extruder is set to 265-295° C., and the screw speed is 80-120 r / min.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a PPE / PPS composite material. The polyphenylene ether resin is an amorphous polymer, and the polyphenylene sulfide resin is a crystalline polymer. The two lack compatibility, and the direct blending process to form an alloy performance is technically difficult. The melt viscosity of nylon-66 is very low, the flow performance is good, and it is easy to process and shape. After adding, the defects of pure PPS being brittle and PPE being too high in melt viscosity can be overcome at the same time, and the flowability of the composite material matrix can be improved, thereby improving the processing performance and enhancing the mechanical strength. The block copolymer grafted maleic anhydride can be dispersed between the interfaces of polyphenylene ether, polyphenylene sulfide and nylon-66, so as to prevent the dispersed phase from agglomerating, reduce the interfacial tension, and improve the interfacial adhesion, so that the compatibility between different resin matrices is obtained. The invention discloses a method for improving the mechanical properties of PPE / PPS composite materials. The method comprises the following steps: a) one end of the long-chain alkyl isocyanate carries a reactive group-isocyanate, which can be chain extended and volume expanded with the terminal hydroxyl group of PPE during melt blending; b) the other end carries an aromatic long-chain alkyl, which can be mutually entangled with nylon-66, and can effectively improve the compatibility and bonding ability between different resin matrices; c) the nano-alumina and the nano-sheet montmorillonite can promote dispersion and delamination of each other during melt blending, increase the internal friction, and thus can be well dispersed and avoid agglomeration; and the PPE / PPS composite material prepared by the invention has good mechanical properties, and the addition of nylon-66, long-chain alkyl isocyanate and acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride plays a positive role in improving the mechanical properties of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the SEM image of the quenched cross-section of the PPE / PPS composite material prepared in Example 1. No obvious phase interface, holes or gaps were observed, indicating that the compatibility between the phases was good. DETAILED DESCRIPTION

[0024] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or the conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments is not specified, they are all conventional products that can be purchased commercially. The techniques not mentioned in the present invention are all referenced to the prior art. Unless otherwise specified, the following examples and comparative examples are parallel experiments, using the same processing steps and parameters.

[0025] Polyphenylene ether: LXR045, Ruicheng Bluestar Chemical New Materials Co., Ltd.;

[0026] Polyphenylene sulfide: QC200P, Solvay, USA;

[0027] Nylon-66: PA-101L, DuPont, USA;

[0028] Long-chain alkyl isocyanate: homemade;

[0029] Acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride: VE-335K, Dongguan Shenghao Plastic Raw Materials Co., Ltd.;

[0030] Antioxidant GA-80: Hubei Qiniu Chemical Technology Co., Ltd.;

[0031] Nano-alumina: Hangzhou Hengna New Materials Co., Ltd.;

[0032] Nanosheet montmorillonite: Zhejiang Huate New Materials Co., Ltd.

[0033] Embodiment 1:

[0034] A PPE / PPS composite material, comprising the following components in parts by weight:

[0035] 50 parts of polyphenylene ether, 40 parts of polyphenylene sulfide, 20 parts of nylon-66, 4 parts of long-chain alkyl isocyanate, 3 parts of acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride, 1 part of antioxidant GA-80, 10 parts of nano-alumina, and 10 parts of nano-sheet montmorillonite;

[0036] Wherein, the preparation method of long-chain alkyl isocyanate is as follows:

[0037]

[0038] Add 25 g of 4,4-methylenediphenyl diisocyanate, 22 g of 9-phenyl-1-nonanol, and 0.04 g of di-n-butyltin dilaurate into 500 ml of toluene, heat to 80° C., react for 2 h, and then distill under reduced pressure to remove the small molecule solvent.

[0039] The preparation method of the above-mentioned PPE / PPS composite material is as follows:

[0040] The raw materials are weighed according to the weight ratio and mixed evenly, and then melt-blended and extruded through a twin-screw extruder. The temperature of the twin-screw extruder is set to 265-295°C, the screw speed is 100r / min, cooled, pelletized, and the obtained pellets are dried at 110°C for 10 hours.

[0041] Embodiment 2:

[0042] A PPE / PPS composite material, comprising the following components in parts by weight:

[0043] 60 parts of polyphenylene ether, 60 parts of polyphenylene sulfide, 30 parts of nylon-66, 5 parts of long-chain alkyl isocyanate, 5 parts of acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride, 2.5 parts of antioxidant GA-80, 15 parts of nano-alumina, and 15 parts of nano-sheet montmorillonite;

[0044] Wherein, the preparation method of long-chain alkyl isocyanate is the same as that in Example 1.

[0045] The preparation method of the above-mentioned PPE / PPS composite material is as follows:

[0046] The raw materials are weighed according to the weight ratio and mixed evenly, and then melt-blended and extruded through a twin-screw extruder. The temperature of the twin-screw extruder is set to 265-295°C, the screw speed is 100r / min, cooled, pelletized, and the obtained pellets are dried at 110°C for 10 hours.

[0047] Embodiment 3:

[0048] A PPE / PPS composite material, comprising the following components in parts by weight:

[0049] 40 parts of polyphenylene ether, 40 parts of polyphenylene sulfide, 10 parts of nylon-66, 2.5 parts of long-chain alkyl isocyanate, 2.5 parts of acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride, 2 parts of antioxidant GA-80, 5 parts of nano-alumina, and 5 parts of nano-sheet montmorillonite;

[0050] Wherein, the preparation method of long-chain alkyl isocyanate is the same as that in Example 1.

[0051] The preparation method of the above-mentioned PPE / PPS composite material is as follows:

[0052] The raw materials are weighed according to the weight ratio and mixed evenly, and then melt-blended and extruded through a twin-screw extruder. The temperature of the twin-screw extruder is set to 265-295°C, the screw speed is 100r / min, cooled, pelletized, and the obtained pellets are dried at 110°C for 10 hours.

[0053] Comparative Example 1:

[0054] It is basically the same as Example 1, except that nylon-66 is not added.

[0055] Comparative Example 2:

[0056] The process is substantially the same as Example 1, except that no long-chain alkyl isocyanate is added.

[0057] Comparative Example 3:

[0058] The method is substantially the same as Example 1, except that no acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride is added.

[0059] Performance Test:

[0060] The composite materials prepared in Examples 1-3 and Comparative Examples 1-3 were injection molded into standard test specimens on an injection molding machine and performance tests were performed;

[0061] Tensile properties are tested according to GB / T 1040-2006;

[0062] Bending properties are tested according to GB / T 9341-2000;

[0063] Izod impact strength is tested in accordance with GB / T 1843-2008;

[0064] The test results are shown in Table 1;

[0065] Table 1:

[0066]

[0067] It can be seen from Table 1 that the PPE / PPS composite material prepared by the present invention has good mechanical properties, and by comparing Example 1 with Comparative Examples 1-3, it can be seen that the addition of nylon-66, long-chain alkyl isocyanate and acrylonitrile-butadiene-styrene block copolymer grafted maleic anhydride plays a positive role in improving the mechanical properties of the composite material.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PPE / PPS composite material, characterized in that: The composition is calculated by weight: 40-60 parts of polyphenylene ether, 40-60 parts of polyphenylene sulfide, 10-30 parts of nylon-66, 5-10 parts of compatibilizer, 0.5-2.5 parts of antioxidant GA-80, 10-30 parts of inorganic filler; The compatibilizer includes long-chain alkyl isocyanate and block copolymer grafted maleic anhydride; The weight ratio of the long-chain alkyl isocyanate to the block copolymer grafted maleic anhydride is 1-5:1-5; The long-chain alkyl isocyanate is prepared from 4,4-methylenediphenyl diisocyanate and 9-phenyl-1-nonanol in a molar ratio of 1:1; The block copolymer grafted with maleic anhydride is an acrylonitrile-butadiene-styrene block copolymer grafted with maleic anhydride; The inorganic filler includes nano-alumina and nano-sheet montmorillonite; The weight ratio of the nano-alumina to the nano-sheet montmorillonite is 1-5:1-5.

2. A method for preparing the PPE / PPS composite material as claimed in claim 1, characterized in that: The raw materials are weighed according to the weight ratio and mixed evenly, and then melt-blended and extruded through a twin-screw extruder, cooled, pelletized and dried.

3. The method for preparing the PPE / PPS composite material according to claim 2, characterized in that: The twin-screw extruder temperature was set at 265-295°C and the screw speed was 80-120 r / min.

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