PC-based building template material with wide use temperature range and production method of PC-based building template material

Abstract

The invention discloses a PC-based building template material with a wide use temperature range and a production method of the PC-based building template material, and belongs to the technical field of building template materials. The PC-based building template material with the wide use temperature range is characterized by being prepared from the following components in parts by weight: 60 to 80 parts of polycarbonate, 10 to 15 parts of modified polyether-ether-ketone, 10 to 20 parts of organic silicon rubber, 3 to 5 parts of a compatible aid, 0.3 to 0.5 part of an antioxidant and 0.2 to 0.5 part of a light stabilizer, the modified polyether-ether-ketone is prepared from maleic anhydride modified polyether-ether-ketone. According to the PC-based building template material, modified polyether-ether-ketone, organic silicon rubber and polycarbonate in a specific proportion are matched to act, so that the compatibility of a matrix is ensured, the high-temperature resistance and low-temperature resistance of the building template material are improved, and the use temperature range of the PC-based building template material is widened; and by adding the compatible auxiliary agent, the overall compatibility is further improved, the phase separation phenomenon is avoided, and the overall consistency and stability of the material are improved.

Description

Technical Field

[0001] The present application relates to a PC-based building formwork material with a wide temperature range and its production method, belonging to the technical field of building formwork materials. Background Art

[0002] The formwork system plays a crucial role in the existing building construction process. Selecting a suitable building formwork can effectively improve the construction efficiency of the building and achieve sustainable construction. A building formwork refers to a temporary structure that supports concrete until it solidifies and forms according to the designed size and geometry. During this process, the building formwork needs to bear its own weight and external loads during construction.

[0003] Traditional building formworks mainly use wood, steel, and aluminum alloy. Wood formworks are easily affected by humidity, resulting in deformation, mildew, and corrosion, with poor durability and limited strength and load-bearing capacity. Steel formworks are strong, but prone to wear and corrosion, reducing the formwork stability and polluting the concrete surface, and with high costs; Aluminum alloy formworks have poor plasticity and require the use of release agents. Therefore, composite material formworks have gradually been proposed.

[0004] Polycarbonate (PC) is a thermoplastic engineering plastic containing carbonate groups in its molecular chain, with a wide molecular weight distribution, usually 32,000 - 115,000. PC is an amorphous resin that is not easy to crystallize, with good heat resistance and low-temperature resistance, having good mechanical properties, flame retardancy, and dimensional stability within a relatively wide temperature range, and can be used for a long time at -40 to 125 °C. However, existing PC composites have weak low-temperature resistance, are prone to forming micro-tears, causing molecular chain breakage, resulting in product cracking, and significantly reducing their mechanical properties in low-temperature environments, severely limiting the application of PC composite building formworks.

[0005] To solve the above problems, the prior art proposes to use a modified material of PC with excellent heat resistance, impact resistance, dimensional stability, and processing fluidity to prepare building formworks. For example, PC / ABS material has excellent heat resistance, impact resistance, dimensional stability, and processing fluidity, but is prone to embrittlement around 0 °C, and its performance will gradually decline after 2 - 3 years of long-term outdoor exposure. Therefore, providing a material with excellent mechanical properties while broadening the temperature range of use of PC-based building formwork materials can greatly expand the application of PC-based building formworks. Summary of the Invention

[0006] To solve the above problems, a PC-based building formwork material with a wide temperature range and its preparation method are provided. The PC-based building formwork material with a wide temperature range improves the high-temperature resistance and low-temperature resistance of the building formwork material and broadens the service temperature range of the PC-based building formwork material by using a specific ratio of modified polyether ether ketone, silicone rubber, and polycarbonate in cooperation while ensuring the compatibility of the matrix. By adding a compatibilizing agent, the overall compatibility is further improved, the phase separation phenomenon is avoided, and the overall consistency and stability of the material are enhanced.

[0007] According to one aspect of the present application, a PC-based building formwork material with a wide temperature range is provided, which includes 60-80 parts by weight of polycarbonate, 10-15 parts by weight of modified polyether ether ketone, 10-20 parts by weight of silicone rubber, 3-5 parts by weight of a compatibilizing agent, 0.3-0.5 parts by weight of an antioxidant, and 0.2-0.5 parts by weight of a light stabilizer; the modified polyether ether ketone is prepared by modifying polyether ether ketone with maleic anhydride.

[0008] Specifically, in the present application, maleic anhydride is used to modify polyether ether ketone, introducing a carboxyl functional group into its molecular chain, which can improve the compatibility of polyether ether ketone in the PC-based building formwork material. On the one hand, the introduced carboxyl group can undergo an esterification reaction with the hydroxyl group of PC, enhancing the linkage with the PC matrix and improving the compatibility and stability of the entire system.

[0009] Optionally, the preparation method of the modified polyether ether ketone includes the following steps:

[0010] S1 Place the polyether ether ketone particles in a reaction vessel, add DMF, stir evenly, add maleic anhydride and an initiator, and under nitrogen protection, raise the temperature for reaction;

[0011] S2 After the reaction is completed, filter, wash, and dry to obtain the modified polyether ether ketone.

[0012] Optionally, in S1, the reaction temperature is 100-120 °C, and the reaction time is 4-6 h; the mass of maleic anhydride is 5-10% of the mass of polyether ether ketone, and the mass of the initiator is 0.5-1% of the mass of polyether ether ketone; the initiator includes benzoyl peroxide.

[0013] Specifically, the present application makes specific limitations on the preparation method of the modified polyether ether ketone. On the one hand, under the action of the initiator, the unsaturated bond of maleic anhydride undergoes a free radical addition reaction with the active sites on the molecular chain of polyether ether ketone to introduce a carboxyl group. On the other hand, the present application makes specific limitations on the modified product and the dosage of each component. If the dosage of maleic anhydride is too much, it will lead to the residue of maleic anhydride, affecting the stability of the material. If the dosage of maleic anhydride is too little, it will affect the modification effect, resulting in insufficient reactive sites with PC and reducing the compatibility.

[0014] Optionally, the compatibilizing agent includes glycidyl methacrylate-butyl acrylate copolymer or glycidyl methacrylate-methyl methacrylate-butyl acrylate terpolymer; the silicone rubber includes methyl silicone rubber or methyl vinyl silicone rubber.

[0015] Specifically, the present application makes specific limitations on the selection of the compatibilizing agent and the silicone rubber. On the one hand, the compatibilizing agent includes glycidyl methacrylate-butyl acrylate copolymer or glycidyl methacrylate-methyl methacrylate-butyl acrylate terpolymer, which introduces epoxy functional groups into the molecular chain of the acrylate polymer. While having the film-forming property and flexibility of the acrylate polymer and the affinity with various organic materials, it also has the high reactivity of epoxy groups. When the compatibilizing agent is mixed with polycarbonate, modified polyether ether ketone, and silicone rubber, the epoxy groups interact with each component to construct a network structure, further enhancing the compatibility of the system. On the other hand, the silicone rubber has good flexibility. The main chain structure composed of silicon-oxygen bonds enables the silicone rubber to have good thermal stability while being able to withstand extremely low temperatures. Its glass transition temperature is generally at -60°C or even lower, and it remains soft and elastic in cold environments without becoming hard and brittle, which can greatly improve the low-temperature resistance of the PC-based building formwork material.

[0016] Optionally, the polycarbonate further includes a modified polycarbonate obtained by graft copolymerization of polycarbonate with a vinyl-containing polysiloxane monomer.

[0017] Specifically, by modifying polycarbonate with a vinyl-containing polysiloxane monomer, the polysiloxane chain segment is grafted onto the PC molecular chain. The polysiloxane chain segment can be better compatible with the silicone rubber and can improve the heat resistance, weather resistance, and other properties of PC, making its stability stronger in a wide temperature range environment.

[0018] Optionally, the preparation of the modified polycarbonate includes the following steps:

[0019] S01 Add polycarbonate to toluene, dissolve it, add a vinyl-containing polysiloxane monomer, stir evenly, add an initiator, and raise the temperature for reaction under a nitrogen atmosphere;

[0020] S02 After the reaction is completed, perform alcohol precipitation, filtration, washing, and drying to obtain the modified polycarbonate.

[0021] Optionally, the vinyl-containing polysiloxane monomer is vinyl-terminated polydimethylsiloxane, and the initiator is benzoyl peroxide; the reaction temperature in S01 is 120 - 150°C, and the reaction time is 4 - 6 h.

[0022] Specifically, the mass of the vinyl-terminated polydimethylsiloxane is 10% to 20% of the mass of the polycarbonate, and the mass of the initiator is 1% to 2% of the mass of the polycarbonate.

[0023] Optionally, the antioxidant includes antioxidant 1010 and antioxidant 168; the light stabilizer includes UV637 or UV981.

[0024] Specifically, the mass ratio of antioxidant 1010 to antioxidant 168 is (2 to 5):1.

[0025] Specifically, the present application uses two antioxidants compounded in a specific ratio, and acts together with other components of the present application to improve the weather resistance of the PC-based building formwork material and extend its service life.

[0026] According to another aspect of the present application, there is also provided a production method of the above-mentioned PC-based building formwork material with a wide use temperature range, including the following steps:

[0027] (1) Weigh polycarbonate, modified polyether ether ketone, silicone rubber, compatibilizing agent, antioxidant and light stabilizer according to parts by weight, add them to a high-speed mixer and mix evenly to obtain a premix;

[0028] (2) Melt and extrude granulate the premix through a twin-screw extruder to obtain PC-based building formwork material particles with a wide use temperature range;

[0029] (3) Inject mold the PC-based building formwork material particles with a wide use temperature range to obtain a PC-based building formwork material with a wide use temperature range.

[0030] Optionally, in step (1), the rotation speed of the high-speed mixer is 500 to 700 rpm, and the stirring time is 15 to 20 min; when granulating by the twin-screw extruder in step (2), it is divided into a feeding section, a plasticizing section and a metering section, the temperature of the feeding section is 180 to 200 °C, the temperature of the plasticizing section is 220 to 240 °C, and the temperature of the metering section is 240 to 260 °C; in the injection molding of step (3), the mold temperature is 50 to 80 °C, the injection pressure is 80 to 100 bar, the holding pressure time is 15 to 20 s, and the cooling time is 90 to 110 s.

[0031] Specifically, the present application defines the production steps and production process parameters of the production method of the PC-based building formwork material with a wide use temperature range to obtain a PC-based building formwork material with a wide use temperature range.

[0032] The beneficial effects of the present application include but are not limited to:

[0033] 1. The PC-based building formwork material with a wide operating temperature range according to the present application, by using a specific ratio of modified polyether ether ketone, silicone rubber and polycarbonate in combination, while ensuring the compatibility of the matrix, improves the high-temperature resistance and low-temperature resistance of the building formwork material, and broadens the operating temperature range of the PC-based building formwork material; adding a compatibilizing agent to further enhance the overall compatibility, avoid phase separation, and improve the overall consistency and stability of the material.

[0034] 2. The PC-based building formwork material with a wide operating temperature range according to the present application uses maleic anhydride to modify polyether ether ketone, introducing carboxyl functional groups on its molecular chain, which can improve the compatibility of polyether ether ketone in the PC-based building formwork material. On the one hand, the introduced carboxyl groups can undergo an esterification reaction with the hydroxyl groups of PC, enhancing the linkage with the PC matrix and improving the compatibility and stability of the entire system.

[0035] 3. The PC-based building formwork material with a wide operating temperature range according to the present application specifically defines silicone rubber and a compatibilizing agent to increase the interaction between components while improving the high-temperature resistance and low-temperature resistance of the overall material, enabling it to have a wide operating temperature range.

[0036] 4. The production method of the PC-based building formwork material with a wide operating temperature range according to the present application has a simple production method, easily available raw materials, is convenient for popularization and utilization, and saves costs. Detailed Embodiments

[0037] The present application will be described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0038] Unless otherwise specified, the raw materials in the embodiments and comparative examples of the present application are all purchased through commercial channels.

[0039] Unless otherwise specified, the methods used in the embodiments and comparative examples of the present application are conventional methods in the prior art.

[0040] Example 1

[0041] A production method of a PC-based building formwork material with a wide operating temperature range:

[0042] (1) Weigh 60 parts of polycarbonate, 10 parts of modified polyether ether ketone, 10 parts of silicone rubber methyl silicone rubber, 3 parts of compatibilizing agent glycidyl methacrylate-butyl acrylate copolymer, 0.3 parts of antioxidant 1010 and antioxidant 168, and 0.2 parts of light stabilizer UV637 and add them to a high-speed mixer for uniform mixing. The mass ratio of antioxidant 1010 to antioxidant 168 is 2:1. The rotation speed of the high-speed mixer is 500 rpm, and the stirring time is 15 min; a premixed material is obtained.

[0043] (2) The premix is melted and extruded into pellets through a twin-screw extruder. When the twin-screw extruder is granulating, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 180°C, the temperature of the plasticizing section is 220°C, and the temperature of the metering section is 240°C; PC-based building formwork material pellets with a wide service temperature range are obtained.

[0044] (3) The PC-based building formwork material pellets with a wide service temperature range are injection-molded. During injection molding, the mold temperature is 50°C, the injection pressure is 80 bar, the holding pressure time is 15 s, and the cooling time is 90 s; PC-based building formwork materials with a wide service temperature range are obtained.

[0045] The preparation method of the modified polyether ether ketone includes the following steps:

[0046] S1 Place the polyether ether ketone pellets in a reaction vessel, add DMF, stir evenly, add maleic anhydride and the initiator benzoyl peroxide, and under nitrogen protection, raise the temperature for reaction. The reaction temperature is 100°C, and the reaction time is 4 h; the mass of maleic anhydride is 5% of the mass of polyether ether ketone, and the mass of the initiator is 0.5% of the mass of polyether ether ketone.

[0047] S2 After the reaction is completed, filter, wash, and dry to obtain the modified polyether ether ketone.

[0048] Example 2

[0049] A production method of a PC-based building formwork material with a wide service temperature range:

[0050] (1) Weigh 80 parts of polycarbonate, 15 parts of modified polyether ether ketone, 20 parts of organosilicon rubber methyl vinyl silicone rubber, 5 parts of compatibilizing agent glycidyl methacrylate-methyl methacrylate-butyl acrylate terpolymer, 0.5 parts of antioxidant 1010 and antioxidant 168, and 0.5 parts of light stabilizer UV981, add them to a high-speed mixer and mix evenly. The mass ratio of antioxidant 1010 to antioxidant 168 is 5:1, the rotation speed of the high-speed mixer is 700 rpm, and the stirring time is 20 min; a premix is obtained.

[0051] (2) The premix is melted and extruded into pellets through a twin-screw extruder. When the twin-screw extruder is granulating, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 200°C, the temperature of the plasticizing section is 240°C, and the temperature of the metering section is 260°C; PC-based building formwork material pellets with a wide service temperature range are obtained.

[0052] (3) The PC-based building formwork material pellets with a wide service temperature range are injection-molded. During injection molding, the mold temperature is 80°C, the injection pressure is 100 bar, the holding pressure time is 20 s, and the cooling time is 110 s; PC-based building formwork materials with a wide service temperature range are obtained.

[0053] The preparation method of modified polyetheretherketone comprises the following steps:

[0054] S1 Place polyetheretherketone particles in a reaction vessel, add DMF, stir evenly, add maleic anhydride and initiator benzoyl peroxide, under nitrogen protection, raise the temperature for reaction, the reaction temperature is 120 °C, and the reaction time is 6 h; the mass of maleic anhydride is 10% of the mass of polyetheretherketone, and the mass of the initiator is 1% of the mass of polyetheretherketone;

[0055] S2 After the reaction is completed, filter, wash, and dry to obtain modified polyetheretherketone.

[0056] Example 3

[0057] A production method of a PC-based building template material with a wide temperature range:

[0058] (1) Weigh 70 parts of polycarbonate, 12 parts of modified polyetheretherketone, 15 parts of methyl vinyl silicone rubber, 4 parts of compatibilizing agent glycidyl methacrylate-butyl acrylate copolymer, 0.4 parts of antioxidant 1010 and antioxidant 168, and 0.3 parts of light stabilizer UV637, add them to a high-speed mixer and mix evenly. The mass ratio of antioxidant 1010 to antioxidant 168 is 3:1, the rotation speed of the high-speed mixer is 600 rpm, and the stirring time is 20 min; obtain a premix;

[0059] (2) Melt and extrude the premix through a twin-screw extruder to form pellets. When the twin-screw extruder forms pellets, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 200 °C, the temperature of the plasticizing section is 230 °C, and the temperature of the metering section is 250 °C; obtain PC-based building template material pellets with a wide temperature range;

[0060] (3) Inject and mold the PC-based building template material pellets with a wide temperature range. During injection molding, the mold temperature is 60 °C, the injection pressure is 90 bar, the holding pressure time is 20 s, and the cooling time is 100 s; obtain a PC-based building template material with a wide temperature range;

[0061] The preparation method of modified polyetheretherketone comprises the following steps:

[0062] S1 Place polyetheretherketone particles in a reaction vessel, add DMF, stir evenly, add maleic anhydride and initiator benzoyl peroxide, under nitrogen protection, raise the temperature for reaction, the reaction temperature is 110 °C, and the reaction time is 5 h; the mass of maleic anhydride is 8% of the mass of polyetheretherketone, and the mass of the initiator is 0.7% of the mass of polyetheretherketone;

[0063] S2 After the reaction is completed, filter, wash, and dry to obtain modified polyetheretherketone.

[0064] Example 4

[0065] Compared with Example 3, Example 4 further includes the process of modifying polycarbonate. The preparation of the modified polycarbonate specifically includes the following steps:

[0066] S01 Add polycarbonate to toluene. After dissolution, add vinyl-terminated polydimethylsiloxane. After stirring evenly, add initiator benzoyl peroxide. The mass of vinyl-terminated polydimethylsiloxane is 10% of the mass of polycarbonate, and the mass of the initiator is 1% of the mass of polycarbonate. Under a nitrogen atmosphere, raise the temperature for reaction. The reaction temperature is 150 °C, and the reaction time is 6 h;

[0067] S02 After the reaction is completed, carry out alcohol precipitation, filtration, washing, and drying to obtain the modified polycarbonate.

[0068] Example 5

[0069] The difference between Example 5 and Example 3 is that it further includes the process of modifying polycarbonate. The preparation of the modified polycarbonate specifically includes the following steps:

[0070] S01 Add polycarbonate to toluene. After dissolution, add vinyl-terminated polydimethylsiloxane. After stirring evenly, add initiator benzoyl peroxide. The mass of vinyl-terminated polydimethylsiloxane is 20% of the mass of polycarbonate, and the mass of the initiator is 2% of the mass of polycarbonate. Under a nitrogen atmosphere, raise the temperature for reaction. The reaction temperature is 120 °C, and the reaction time is 4 h;

[0071] S02 After the reaction is completed, carry out alcohol precipitation, filtration, washing, and drying to obtain the modified polycarbonate.

[0072] Example 6

[0073] The difference between Example 6 and Example 3 is that the antioxidant only includes 0.4 parts of antioxidant 1010, and the rest are the same.

[0074] Example 7

[0075] The difference between Example 7 and Example 3 is that the antioxidant only includes 0.4 parts of antioxidant 168, and the rest are the same.

[0076] Comparative Example 1

[0077] The difference between Comparative Example 1 and Example 3 is that polyether ether ketone is used to replace the modified polyether ether ketone, and the rest are the same.

[0078] Comparative Example 2

[0079] The difference between Comparative Example 2 and Example 3 is that butadiene rubber is used to replace methyl vinyl silicone rubber, an organosilicon rubber, and the rest are the same.

[0080] Comparative Example 3

[0081] The difference between Comparative Example 3 and Example 3 is that the compatibilizing agent is not included, and the rest are the same.

[0082] Experimental Example 1

[0083] Perform performance tests on a PC-based building formwork material with a wide service temperature range prepared in Examples 1-7 and Comparative Examples 1-3. The test methods are as follows:

[0084] Tensile strength: Tested in accordance with ISO 527 standard, test speed 50 mm / min;

[0085] Flexural strength: Tested in accordance with ISO 178 standard, test speed 2 mm / min;

[0086] Low-temperature impact strength: Tested in accordance with ISO 179-1:2010(E) standard, test temperature is -30 °C;

[0087] Oxidation induction period: Tested in accordance with GB / T 19466.6-2009 standard, test temperature is 180 °C;

[0088] Heat distortion temperature: Tested in accordance with ISO 75 standard, 1.82 MPa.

[0089] The test results are shown in Table 1.

[0090] Table 1 Performance test results

[0091]

[0092] Experimental Example 2

[0093] Prepare test specimens from a PC-based building formwork material with a wide service temperature range prepared in Examples 1-7 and Comparative Examples 1-3 of the present application. The dimensions of the specimens are 120 mm in length, 10 mm in width, and 4 mm in thickness. Place the specimens in an aging chamber with 1000 W high-pressure mercury lamp ultraviolet light at 80 °C and irradiate continuously for 1000 h. Test the reduction rates of tensile strength and flexural strength after ultraviolet irradiation compared with before irradiation. The test results are shown in Table 2.

[0094] Table 2 Ultraviolet aging test results

[0095]

[0096]

[0097] As can be seen from Table 1 and Table 2, a PC-based building template material with a wide temperature range provided by the present application has good mechanical properties, and also has good high-temperature and low-temperature resistance. After ultraviolet aging test, its mechanical properties decrease less. Compared with Examples 1 to 3, Examples 4 and 5 adopt modified polycarbonate, and all performances are improved. In Comparative Example 1, modified polyether ether ketone is not adopted, and its various performances decrease significantly. In Comparative Example 2, the type of rubber added is changed, resulting in a significant decrease in performance.

[0098] As mentioned above, the above are only the embodiments of the present application. The protection scope of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A PC-based building formwork material with a wide temperature range, characterized in that: The invention comprises, by weight, 60 to 80 parts of polycarbonate, 10 to 15 parts of modified polyetheretherketone, 10 to 20 parts of silicone rubber, 3 to 5 parts of compatibility aid, 0.3 to 0.5 parts of antioxidant and 0.2 to 0.5 parts of light stabilizer; the modified polyetheretherketone is prepared by using maleic anhydride modified polyetheretherketone.

2. The PC-based building formwork material with a wide temperature range according to claim 1, characterized in that: The preparation method of the modified polyetheretherketone comprises the following steps: S1: placing polyetheretherketone particles in a reaction vessel, adding DMF, stirring evenly, adding maleic anhydride and initiator, and heating to react under nitrogen protection; After the reaction in S2 is completed, the product is filtered, washed and dried to obtain modified polyetheretherketone.

3. The PC-based building formwork material with a wide temperature range according to claim 2, characterized in that: In S1, the reaction temperature is 100-120° C., and the reaction time is 4-6 hours; the mass of the maleic anhydride is 5-10% of the mass of the polyetheretherketone, and the mass of the initiator is 0.5-1% of the mass of the polyetheretherketone; and the initiator includes benzoyl peroxide.

4. The PC-based building formwork material with a wide temperature range according to claim 1, characterized in that: The compatibility aid includes a glycidyl methacrylate-butyl acrylate copolymer or a glycidyl methacrylate-methyl methacrylate-butyl acrylate terpolymer; and the organic silicone rubber includes methyl silicone rubber or methyl vinyl silicone rubber.

5. The PC-based building formwork material with a wide temperature range according to claim 1, characterized in that: The polycarbonate also includes modified polycarbonate obtained by graft copolymerization of polycarbonate with polysiloxane monomers containing vinyl groups.

6. The PC-based building formwork material with a wide temperature range according to claim 5, characterized in that: The preparation of the modified polycarbonate comprises the following steps: S01: adding polycarbonate into toluene, adding vinyl-containing polysiloxane monomer after dissolving, adding initiator after stirring evenly, and heating to react under nitrogen atmosphere; After the S02 reaction is completed, the modified polycarbonate is obtained by alcohol precipitation, filtration, washing and drying.

7. The PC-based building formwork material with a wide temperature range according to claim 6, characterized in that: The vinyl-containing polysiloxane monomer is vinyl-terminated polydimethylsiloxane, and the initiator is benzoyl peroxide; the reaction temperature in S01 is 120-150° C., and the reaction time is 4-6 hours.

8. The PC-based building formwork material with a wide temperature range according to claim 6, characterized in that: The antioxidant includes antioxidant 1010 and antioxidant 168; the light stabilizer includes UV637 or UV981.

9. The method for producing a PC-based building formwork material having a wide temperature range according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) Weighing polycarbonate, modified polyetheretherketone, silicone rubber, compatibility aid, antioxidant and light stabilizer according to weight parts, adding them into a high-speed mixer and mixing them evenly to obtain a premix; (2) melting and extruding the premixed material through a twin-screw extruder to obtain PC-based building formwork material particles with a wide temperature range; (3) The PC-based building formwork material particles with a wide operating temperature range are injection molded to obtain the PC-based building formwork material with a wide operating temperature range.

10. The method for producing a PC-based building formwork material with a wide temperature range according to claim 9, characterized in that: In step (1), the speed of the high-speed mixer is 500-700 rpm, and the stirring time is 15-20 min; in step (2), the twin-screw extruder is divided into a feeding section, a plasticizing section and a metering section during granulation, and the feeding section temperature is 180-200° C., the plasticizing section temperature is 220-240° C., and the metering section temperature is 240-260° C.; in step (3), during injection molding, the mold temperature is 50-80° C., the injection molding pressure is 80-100 bar, the holding time is 15-20 s, and the cooling time is 90-110 s.

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