Modified polyphenylene ether materials and their applications

Abstract

The present application relates to a modified polyphenylene ether material and its application. The modified polyphenylene ether material comprises the following components by weight: 60 to 85 parts of polyphenylene ether resin, 2 to 15 parts of polystyrene resin, 2 to 10 parts of toughening agent, 5 to 15 parts of flame retardant and 1 to 6 parts of inorganic porous material; wherein the average pore size of the inorganic porous material is 4 nm to 10 nm, and the pore volume is 0.1 to 0.8 cm 3 / g. The modified polyphenylene ether material has high flame retardancy, high mechanical strength, and good resistance to heat and oxygen aging.

Description

Technical Field

[0001] The present application relates to the technical field of polymer materials, and in particular to a modified polyphenylene ether material and application thereof. Background Art

[0002] Polyphenylene ether (PPE) is widely used in photovoltaic, electronic and electrical fields due to its good electrical insulation, dimensional stability, low density and heat resistance. However, with the development of photovoltaic and electronic and electrical fields in recent years, higher requirements are placed on material performance, especially the material's resistance to thermal oxygen aging. This is because many application scenarios in this field need to be in a high temperature environment for a long time. Under thermal oxygen conditions, the material's insufficient resistance to thermal oxygen aging will lead to the deterioration of its mechanical properties (such as tensile and impact properties) and electrical properties (such as dielectric constant and dielectric loss), affecting its later use. The thermal oxygen aging resistance of traditional polyphenylene ether materials can no longer meet the current demand for the use of materials in the photovoltaic and electronic and electrical fields.

[0003] At the same time, the flame retardant properties of polyphenylene ether itself are poor, and the material often needs to be flame-retardant modified. In the traditional method, a polyphenylene ether material with a high flame retardant grade can be obtained by adding a halogen-free flame retardant, but the addition of a halogen-free flame retardant will affect the mechanical properties of the material, especially the commonly used phosphate flame retardants, which will also significantly reduce the material's resistance to heat and oxygen aging (phosphate flame retardants are easy to react with polyphenylene ether under hot and oxidative conditions, thereby accelerating the aging of the material performance). This makes it difficult for polyphenylene ether materials to simultaneously take into account high flame retardancy, high mechanical strength and heat and oxygen aging resistance, which limits their application in the fields of photovoltaics and electronic appliances. Summary of the invention

[0004] Based on this, the present application provides a modified polyphenylene ether material with high flame retardancy, high mechanical strength, and good resistance to heat and oxygen aging and its application.

[0005] In a first aspect of the present application, a modified polyphenylene ether material is provided, comprising the following components in parts by weight:

[0006] 60 to 85 parts of polyphenylene ether resin, 2 to 15 parts of polystyrene resin, 2 to 10 parts of toughening agent, 5 to 15 parts of flame retardant and 1 to 6 parts of inorganic porous material;

[0007] The average pore size of the inorganic porous material is 4 nm to 10 nm, and the pore volume is 0.1 to 0.8 cm 3 / g.

[0008] In one embodiment, the inorganic porous material has an average pore size of 9 nm to 10 nm and a pore volume of 0.5 to 0.6 cm 3 / g.

[0009] In one embodiment, the inorganic porous material is porous silicate; further, the inorganic porous material includes one or both of porous magnesium silicate and porous aluminum silicate; further, the inorganic porous material is porous magnesium silicate.

[0010] In one embodiment, the intrinsic viscosity of the polyphenylene ether resin is 0.22 to 0.5 dl / g; further, the intrinsic viscosity of the polyphenylene ether resin is 0.22 to 0.47 dl / g; further, the intrinsic viscosity of the polyphenylene ether resin is 0.43 to 0.47 dl / g.

[0011] In one embodiment, the modified polyphenylene ether material comprises the following components in parts by weight:

[0012] 70 to 80 parts of polyphenylene ether resin, 3 to 10 parts of polystyrene resin, 4 to 7 parts of toughening agent, 8 to 12 parts of flame retardant and 3 to 5 parts of inorganic porous material.

[0013] In one embodiment, the flame retardant is a halogen-free flame retardant; further, the flame retardant is a phosphate flame retardant; further, the flame retardant is one or more of resorcinol-bis(diphenyl phosphate), bisphenol A-bis(diphenyl phosphate) and resorcinol-bis[di(2,6-dimethylphenyl)phosphate].

[0014] In one embodiment, the polystyrene resin is one or more of atactic polystyrene, syndiotactic polystyrene and polybutadiene grafted polystyrene copolymer; further, the polystyrene resin is polybutadiene grafted polystyrene copolymer.

[0015] In one embodiment, the toughening agent is one or more of ethylene-propylene rubber, nitrile rubber, butadiene rubber, ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene / butylene-styrene block copolymer and styrene-ethylene / propylene-styrene block copolymer; further, the toughening agent is styrene-ethylene / butylene-styrene block copolymer.

[0016] In one embodiment, the modified polyphenylene ether material further comprises 0.2 to 1 part of an antioxidant in parts by weight; further, the antioxidant is one or more of a hindered phenol antioxidant, an aromatic amine antioxidant, a phosphite antioxidant and a thioester antioxidant; further, the antioxidant is a combination of a hindered phenol antioxidant and a thioester antioxidant.

[0017] A second aspect of the present application provides a photovoltaic power generation system or an electronic device, the components of which include the modified polyphenylene ether material described in the first aspect.

[0018] The above-mentioned modified polyphenylene ether material introduces an inorganic porous material with a specific average pore size and pore volume on the basis of reasonable matching of various components, so that the prepared modified polyphenylene ether material has good flame retardancy, mechanical strength and resistance to thermal oxidative aging. In particular, after thermal oxidative aging, it can still maintain the original flame retardant grade and achieve a good flame retardant effect, which can better meet the current performance requirements for materials in the photovoltaic and electronic and electrical fields. DETAILED DESCRIPTION

[0019] The modified polyphenylene ether material and its application of the present application are further described in detail below in conjunction with specific embodiments. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] As used herein, "one or more" refers to any one, any two, or any two or more of the listed items.

[0022] In this application, "first aspect", "second aspect", "third aspect", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0023] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0024] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0025] The percentage contents involved in this application, unless otherwise specified, refer to mass percentage for solid-liquid mixing and solid-solid mixing, and refer to volume percentage for liquid-liquid mixing.

[0026] The percentage concentrations mentioned in this application, unless otherwise specified, refer to the final concentration, which refers to the percentage of the added component in the system after the addition of the component.

[0027] The temperature parameters in this application, unless otherwise specified, allow for both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the accuracy range of instrument control.

[0028] The room temperature in the present application generally refers to 4°C to 30°C, preferably 20±5°C.

[0029] At present, there is a method to provide a polyphenylene ether composition. In a halogen-free flame-retardant polyphenylene ether material system, by selecting a polyphenylene ether resin with a shear viscosity change rate ≥ 8, adding a certain proportion of polystyrene resin and toughening agent, the problem of deterioration of material properties caused by halogen-free flame retardants is solved, and a halogen-free flame-retardant polyphenylene ether composition that can take into account high flame retardancy, excellent mechanical properties and heat-oxidation aging resistance is obtained, which can meet the current performance requirements of materials in the photovoltaic and electronic and electrical fields. However, the above method mainly focuses on the attenuation of the mechanical properties of the material after thermal oxidative aging of the polyphenylene ether composition, and does not pay attention to the flame retardant properties of the material after thermal oxidative aging. The present application has found through research that the addition of polystyrene resins in the composition will cause a significant attenuation in the flame retardant properties of the material after thermal oxidative aging, that is, this method is difficult to truly take into account high flame retardancy, high mechanical strength and good heat-oxidation aging resistance.

[0030] Based on this, an example of the present application provides a modified polyphenylene ether material, which includes the following components in parts by weight:

[0031] 60 to 85 parts of polyphenylene ether resin, 2 to 15 parts of polystyrene resin, 2 to 10 parts of toughening agent, 5 to 15 parts of flame retardant and 1 to 6 parts of inorganic porous material;

[0032] The average pore size of the inorganic porous material is 4 nm to 10 nm, and the pore volume is 0.1 to 0.8 cm 3 / g.

[0033] The above-mentioned modified polyphenylene ether material introduces an inorganic porous material with a specific average pore size and pore volume on the basis of reasonable matching of various components, so that the prepared modified polyphenylene ether material has good flame retardancy, mechanical strength and resistance to thermal oxidative aging. In particular, after thermal oxidative aging, it can still maintain the original flame retardant grade and achieve a good flame retardant effect, which can better meet the current performance requirements for materials in the photovoltaic and electronic and electrical fields.

[0034] Specifically, the weight parts of the polyphenylene ether resin include but are not limited to 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts or the range between any two of the foregoing values.

[0035] Specifically, the weight parts of the polystyrene resin include but are not limited to: 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or a range between any two of the foregoing values.

[0036] Specifically, the weight proportion of the toughening agent includes, but is not limited to, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or a range between any two of the foregoing values.

[0037] Specifically, the weight proportion of the flame retardant includes, but is not limited to, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts or a range between any two of the foregoing values.

[0038] Specifically, the weight parts of the inorganic porous material include, but are not limited to: 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts or a range between any two of the aforementioned values.

[0039] Specifically, the average pore size of the inorganic porous material includes, but is not limited to, 4 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, 10 nm or a range between any two of the foregoing values.

[0040] Specifically, the pore volume of the inorganic porous material includes but is not limited to: 0.1 cm 3 / g, 0.2cm 3 / g, 0.3cm 3 / g, 0.4cm 3 / g, 0.5cm 3 / g, 0.6m 3 / g, 0.7cm 3 / g, 0.8cm 3 / g or the range between any two of the aforementioned values.

[0041] In one example, the average pore size of the inorganic porous material is 9 nm to 10 nm, and the pore volume is 0.5 to 0.6 cm 3 / g. Reasonable control of the average pore size and pore volume of the inorganic porous material can optimize the mechanical properties of the material while maintaining the flame retardancy of the material after thermal oxidative aging.

[0042] In one example, the inorganic porous material is porous silicate. Further, the inorganic porous material includes one or both of porous magnesium silicate and porous aluminum silicate. Further, the inorganic porous material is porous magnesium silicate.

[0043] In one example, the intrinsic viscosity of the polyphenylene ether resin is 0.22-0.5 dl / g. Specifically, the intrinsic viscosity of the polyphenylene ether resin includes but is not limited to: 0.22 dl / g, 0.25 dl / g, 0.3 dl / g, 0.32 dl / g, 0.35 dl / g, 0.4 dl / g, 0.43 dl / g, 0.45 dl / g, 0.47 dl / g, 0.5 dl / g or a range between any two of the foregoing values.

[0044] Furthermore, the intrinsic viscosity of the polyphenylene ether resin is 0.22 to 0.47 dl / g. Furthermore, the intrinsic viscosity of the polyphenylene ether resin is 0.43 to 0.47 dl / g. Reasonable control of the intrinsic viscosity of the polyphenylene ether resin can improve the retention rate of the mechanical properties of the material after thermal oxidative aging while maintaining the flame retardancy of the material after thermal oxidative aging.

[0045] In one example, the modified polyphenylene ether material includes the following components in parts by weight: 70 to 80 parts of polyphenylene ether resin, 3 to 10 parts of polystyrene resin, 4 to 7 parts of toughening agent, 8 to 12 parts of flame retardant and 3 to 5 parts of inorganic porous material. Furthermore, the modified polyphenylene ether material includes the following components in parts by weight: 70 to 74 parts of polyphenylene ether resin, 4 to 6 parts of polystyrene resin, 5 to 7 parts of toughening agent, 9 to 11 parts of flame retardant and 3 to 4 parts of inorganic porous material. Reasonable control of the weight of each component can optimize the notched impact strength retention rate of the material while maintaining the flame retardancy of the material after thermal oxidation aging.

[0046] Without limitation, the flame retardant is a halogen-free flame retardant. In one example, the flame retardant is a phosphate flame retardant. Further, the flame retardant is one or more of resorcinol-bis(diphenyl phosphate), bisphenol A-bis(diphenyl phosphate) and resorcinol-bis[di(2,6-dimethylphenyl) phosphate]. Further, the flame retardant is bisphenol A-bis(diphenyl phosphate). Selecting a suitable flame retardant can optimize the mechanical properties of the material while maintaining the flame retardancy of the material after thermal oxidative aging.

[0047] In one example, the polystyrene resin is one or more of atactic polystyrene, syndiotactic polystyrene and polybutadiene grafted polystyrene copolymer. Further, the polystyrene resin is polybutadiene grafted polystyrene copolymer. Selecting a suitable polystyrene resin can optimize the mechanical properties of the material while maintaining the flame retardancy of the material after thermal oxidative aging.

[0048] In one example, the toughening agent is one or more of ethylene-propylene rubber, nitrile rubber, butadiene rubber, ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene / butylene-styrene block copolymer and styrene-ethylene / propylene-styrene block copolymer. Further, the toughening agent is styrene-ethylene / butylene-styrene block copolymer. Selecting a suitable toughening agent can optimize the mechanical properties of the material and improve the retention rate of the mechanical properties of the material after thermal oxidative aging while maintaining the flame retardancy of the material after thermal oxidative aging.

[0049] In addition, without limitation, according to the material performance requirements, the modified polyphenylene ether material, in parts by weight, also includes 0.2 to 1 part of an antioxidant.

[0050] Without limitation, the antioxidant is one or more of a hindered phenol antioxidant, an aromatic amine antioxidant, a phosphite antioxidant, and a thioester antioxidant. For example, the hindered phenol antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant 1010), β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl alcohol ester (antioxidant 1076), N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine (antioxidant 1098), and 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H, The antioxidant is one or more of 3H,5H)-trione (antioxidant 1790); the aromatic amine antioxidant is one or more of dioctyl diphenylamine, butyl octyl diphenylamine and dinonyl diphenylamine; the phosphite antioxidant is one or more of tris [2.4-di-tert-butylphenyl] phosphite (antioxidant 168) and nonylphenyl phosphite (antioxidant TP80); the thioester antioxidant is one or more of pentaerythritol dodecathiopropyl ester, distearyl thiodipropionate (antioxidant DSTP) and distearyl thiodipropionate.

[0051] In one example, the antioxidant is a combination of a hindered phenol antioxidant and a thioester antioxidant. Optionally, the weight ratio of the hindered phenol antioxidant to the thioester antioxidant is 1:(0.5-1.5).

[0052] Another example of the present application provides a method for preparing the modified polyphenylene ether material as described above, comprising the following steps:

[0053] The components are mixed and extruded into pellets to prepare the modified polyphenylene ether material.

[0054] In one example, the step of mixing and extruding the components comprises: firstly mixing the remaining components except the flame retardant to prepare a mixture; and then extruding and granulating the mixture with the flame retardant. Without limitation, the mixture is passed through an extrusion granulation device (such as an extruder), and the flame retardant is fed from the side of the extrusion granulation device for extrusion granulation.

[0055] In one example, the conditions for extrusion granulation include: using a twin-screw extruder, an extrusion temperature of 255° C. to 270° C., and a screw speed of 350 to 450 rpm.

[0056] Another example of the present application provides a photovoltaic power generation system or electronic device, the components of which include the modified polyphenylene ether material as described above. Without limitation, the components refer to an electric control box, a junction box or a connector in the photovoltaic power generation system or electronic device.

[0057] The following are specific examples.

[0058] Unless otherwise specified, the test methods for the parameters in the embodiments are as follows:

[0059] Average pore size: BET method;

[0060] Kong Rong: BET method;

[0061] Intrinsic viscosity: HG / T 2364-1992, the test temperature is 25℃, and the test solvent is chloroform.

[0062] Unless otherwise specified, the raw materials used in the examples are all commercially available products. Some of the raw materials used in the examples are as follows:

[0063] Polyphenylene ether resin 1: intrinsic viscosity 0.25 dl / g, LXN025, Nantong Xingchen;

[0064] Polyphenylene ether resin 2: intrinsic viscosity 0.35 dl / g, LXN035, Nantong Xingchen;

[0065] Polyphenylene ether resin 3: intrinsic viscosity 0.45 dl / g, LXN045, Nantong Xingchen;

[0066] Polyphenylene ether resin 4: intrinsic viscosity 0.50 dl / g, LXN050, Nantong Xingchen;

[0067] Polystyrene resin 1: PS 350K, polybutadiene grafted polystyrene copolymer, Guoheng, Taiwan, China;

[0068] Polystyrene resin 2: GPPS 123P general purpose polystyrene, Shanghai Saike;

[0069] Toughener 1: styrene-ethylene / butylene-styrene block copolymer, SEBS 6151, Taiwan Rubber Co., Ltd., China;

[0070] Toughener 2: styrene-butadiene-styrene block copolymer, SBS 792, Baling Petrochemical;

[0071] Halogen-free flame retardant 1: bisphenol A-bis(diphenyl phosphate), BDP, Zhejiang Wansheng Chemical;

[0072] Halogen-free flame retardant 2: resorcinol bis(diphenyl phosphate), RDP, Zhejiang Wansheng Chemical;

[0073] Porous magnesium silicate 1, average pore size 9.2nm, pore volume 0.52cm 3 / g, homemade;

[0074] Porous magnesium silicate 2, average pore size 4.3nm, pore volume 0.21cm 3 / g, homemade;

[0075] Porous magnesium silicate 3, average pore size 3.0nm, pore volume 0.08cm 3 / g, homemade;

[0076] Porous magnesium silicate 4, average pore size 11.8nm, pore volume 0.92cm 3 / g, homemade;

[0077] Porous aluminum silicate, average pore size 10.3nm, pore volume 0.58cm 3 / g, homemade.

[0078] Antioxidant: The weight ratio of antioxidant 1010 to antioxidant DSTP is 1:1 and they are commercially available.

[0079] The preparation of porous magnesium silicate 1-4 and porous aluminum silicate can be carried out by referring to the traditional method. Without limitation, the preparation steps of porous magnesium silicate 1-4 and porous aluminum silicate are:

[0080] Sodium silicate and MgSO4 (or Al2(SO4)3) are used as raw materials to prepare sodium silicate aqueous solution and magnesium sulfate (or aluminum sulfate) aqueous solution respectively, and then 1 mol / L H2SO4 aqueous solution or solid NaOH is used to control the pH value of the sodium silicate solution to 6-8. 2- and Mg 2+The molar ratio is 1:1 (or the molar ratio of sodium silicate to Al2(SO4)3 is set to 3:1), and the magnesium sulfate (or aluminum sulfate) aqueous solution is added dropwise into the sodium silicate aqueous solution at a constant rate to prepare a magnesium silicate (or aluminum silicate) precipitate, which is dried in an oven at 105°C after being allowed to stand, filtered, and washed with water, and then ground and sieved to obtain a powdered magnesium silicate (or aluminum silicate) sample. Finally, the obtained powdered magnesium silicate (or aluminum silicate) sample is calcined in a muffle furnace by controlling the calcination temperature (200°C-600°C) and calcination time to obtain porous magnesium silicates 1-4 and porous aluminum silicates with different pore sizes and pore volumes.

[0081] Examples and Comparative Examples

[0082] The preparation methods of the modified polyphenylene ether materials of the embodiments and comparative examples are as follows:

[0083] (1) Take the raw materials according to the weight composition of Tables 1 to 3 below;

[0084] (2) mixing and dispersing the remaining raw materials except the halogen-free flame retardant through a high-speed mixer to obtain a mixture;

[0085] (3) The mixed material is passed through a twin-screw extruder, and a halogen-free flame retardant is fed to the side of the twin-screw extruder for extrusion granulation to obtain a modified polyphenylene ether material; wherein the extrusion temperature is: 270° C. in zone 1, 260° C. in zone 2, and 255° C. in zones 3 to 10. The screw speed is 400 rpm.

[0086] Test Case

[0087] The performance test methods are as follows:

[0088] (1) Flame retardancy test: refer to UL 94-2013 test standard, sample thickness 1mm;

[0089] (2) Notched impact strength: tested according to the ISO 178-2019 A-type notch;

[0090] (3) Thermal oxygen aging resistance test: After the material is aged in an oven at 150°C for 500 hours, the notched impact strength and flame retardancy of the material are tested again, and the performance changes of the material before and after thermal oxygen aging are compared: notched impact strength retention rate = notched impact strength after aging / notched impact strength before aging × 100%.

[0091] The performance test results are shown in Tables 1 to 3.

[0092] Table 1

[0093]

[0094] Table 2

[0095]

[0096]

[0097] Table 3

[0098]

[0099] From the comparison between the embodiments and the comparative examples, it can be seen that the present application, by adding silicate and reasonably controlling the pore size, pore volume and dosage of the silicate, can make the prepared modified polyphenylene ether material have good flame retardancy, mechanical strength and resistance to thermal oxidative aging, especially after thermal oxidative aging, it can still maintain the original flame retardant grade and achieve good flame retardant effect.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solutions of the present application in detail, but cannot be understood as limiting the scope of protection of the patent application. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, which all belong to the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent of the present application shall be based on the contents of the attached claims, and the description can be used to interpret the contents of the claims.

Claims

1. A modified polyphenylene ether material, characterized in that: In parts by weight, it includes the following components: 60 to 85 parts of polyphenylene ether resin, 2 to 15 parts of polystyrene resin, 2 to 10 parts of toughening agent, 5 to 15 parts of flame retardant and 1 to 6 parts of inorganic porous material; The average pore size of the inorganic porous material is 4 nm to 10 nm, and the pore volume is 0.1 to 0.8 cm 3 / g.

2. The modified polyphenylene ether material according to claim 1, characterized in that: The inorganic porous material has an average pore size of 9 nm to 10 nm and a pore volume of 0.5 to 0.6 cm 3 / g.

3. The modified polyphenylene ether material according to claim 1, characterized in that: The inorganic porous material is porous silicate.

4. The modified polyphenylene ether material according to claim 3, characterized in that: The inorganic porous material includes one or both of porous magnesium silicate and porous aluminum silicate.

5. The modified polyphenylene ether material according to claim 4, characterized in that: The inorganic porous material is porous magnesium silicate.

6. The modified polyphenylene ether material according to claim 1, characterized in that: The intrinsic viscosity of the polyphenylene ether resin is 0.22-0.5 dl / g.

7. The modified polyphenylene ether material according to claim 6, characterized in that: The intrinsic viscosity of the polyphenylene ether resin is 0.22-0.47 dl / g.

8. The modified polyphenylene ether material according to claim 7, characterized in that: The intrinsic viscosity of the polyphenylene ether resin is 0.43-0.47 dl / g.

9. The modified polyphenylene ether material according to claim 1, characterized in that: In parts by weight, it includes the following components: 70 to 80 parts of polyphenylene ether resin, 3 to 10 parts of polystyrene resin, 4 to 7 parts of toughening agent, 8 to 12 parts of flame retardant and 3 to 5 parts of inorganic porous material.

10. The modified polyphenylene ether material according to any one of claims 1 to 9, characterized in that: The flame retardant is a halogen-free flame retardant.

11. The modified polyphenylene ether material according to claim 10, characterized in that: The flame retardant is a phosphate flame retardant.

12. The modified polyphenylene ether material according to claim 11, characterized in that: The flame retardant is one or more of resorcinol-bis(diphenyl phosphate), bisphenol A-bis(diphenyl phosphate) and resorcinol-bis[di(2,6-dimethylphenyl)phosphate].

13. The modified polyphenylene ether material according to any one of claims 1 to 9, characterized in that: The polystyrene resin is one or more of atactic polystyrene, syndiotactic polystyrene and polybutadiene grafted polystyrene copolymer.

14. The modified polyphenylene ether material according to claim 13, characterized in that: The polystyrene resin is a polybutadiene-grafted polystyrene copolymer.

15. The modified polyphenylene ether material according to any one of claims 1 to 9, characterized in that: The toughening agent is one or more of ethylene-propylene rubber, nitrile rubber, butadiene rubber, ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene / butylene-styrene block copolymer and styrene-ethylene / propylene-styrene block copolymer.

16. The modified polyphenylene ether material according to claim 15, characterized in that: The toughening agent is styrene-ethylene / butylene-styrene block copolymer.

17. The modified polyphenylene ether material according to any one of claims 1 to 9, characterized in that: In parts by weight, the components also include 0.2 to 1 part of antioxidant.

18. The modified polyphenylene ether material according to claim 17, characterized in that: The antioxidant is one or more of hindered phenol antioxidants, aromatic amine antioxidants, phosphite antioxidants and thioester antioxidants.

19. The modified polyphenylene ether material according to claim 18, characterized in that: The antioxidant is a combination of a hindered phenol antioxidant and a thioester antioxidant.

20. A photovoltaic power generation system or electronic device, characterized in that: Its components include the modified polyphenylene ether material according to any one of claims 1 to 19.

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