Continuous fiber / hollow microsphere thermoplastic sandwich panel and method of making same

Abstract

The application provides a continuous fiber / hollow microsphere thermoplastic sandwich panel and a preparation method thereof, and belongs to the technical field of composite material forming, and aims to solve the lightweight and shear reinforcement technical problems of resin fiber composite materials. The continuous fiber / hollow microsphere sandwich panel comprises upper and lower fiber fabric layers and a hollow microsphere layer in the middle, and is filled with a resin bonding phase between and inside the layers. The preparation method comprises the following steps: sequentially laying fiber I, hollow microspheres and fiber II on a mold; sealing the mold; guiding a resin solution to the mold through a high-pressure or vacuum pouring process and solidifying; and taking out the mold to obtain the continuous fiber / hollow microsphere sandwich panel. The resin solution comprises PMMA, MMA and an initiator. The forming process of the application is simple, the cost is low, and the hollow microspheres can be uniformly distributed in the sandwich panel layer. The sandwich panel has excellent mechanical properties and good heat preservation effect.

Description

Technical Field

[0001] This invention belongs to the technical field of composite material molding, and particularly relates to a thermoplastic sandwich panel. Background Technology

[0002] Polymethyl methacrylate (PMMA) is an important transparent engineering plastic, also known as acrylic or plexiglass. PMMA has a lower density than glass, with a density of approximately 1.14-1.20 g / cm³. 3 It possesses good light transmittance, electrical insulation, chemical stability, and mechanical strength. Lightweight materials, characterized by low density, high strength, and some thermal insulation properties, can be widely used as core materials in the integrated molding of composite sandwich panels. This allows the integrated sandwich panels to achieve superior mechanical properties while maintaining their original performance, expanding the application of resins and lightweight materials in lightweight structures. The thickness variation range of integrated sandwich panels is generally 10–25 mm. The technical challenge of vacuum infusion molding lies in how to effectively and completely impregnate the composite sandwich structure with resin. Furthermore, the large cross-sectional thickness presents challenges in controlling the curing temperature. Patent publication number CN115850895A discloses a continuous fiber reinforced PMMA composite material, its preparation method, and its application. The method involves forming resin component A with a peroxide initiator and MMA monomers, and resin component B with a reducing agent and MMA monomers. Components A and B are mixed uniformly before use, prepolymerized to the infusion viscosity, and then formed into a PMMA composite material with continuous fibers under vacuum or high-pressure flow conditions. Although continuous fiber reinforced PMMA composites have the characteristics of high strength and high stiffness, in reality, for some composites with large thickness, single fiber reinforced composites are more expensive, heavier, and have poor thermal insulation. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a continuous fiber / hollow microsphere thermoplastic sandwich panel and its preparation method. The prepared composite material has high strength and good thermal insulation effect.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A continuous fiber fabric / hollow microsphere sandwich panel includes upper and lower fiber fabric layers and a middle hollow microsphere layer, with resin bonding phase filling the spaces between and inside the layers.

[0006] The thickness of the hollow microsphere layer is 1mm-50mm, and the thickness of the fiber fabric layer is 1mm-100mm.

[0007] A continuous fiber / hollow microsphere thermoplastic sandwich panel and its preparation method, comprising the following steps:

[0008] (1) Fiber I, hollow microspheres and fiber II are laid sequentially on the mold;

[0009] (2) Seal the mold and evacuate it to a vacuum;

[0010] (3) The resin solution is poured into the mold and cured. After demolding, a continuous fiber fabric / hollow microsphere sandwich panel is obtained.

[0011] The resin solution includes PMMA, MMA, and an initiator.

[0012] Fiber I and fiber II are independently selected from any one of glass fiber, carbon fiber, and basalt fiber.

[0013] The hollow microspheres are inorganic microspheres and / or organic microspheres.

[0014] The inorganic microspheres are one or more of hollow glass microspheres, hollow ceramic microspheres, and carbon hollow microspheres; the organic microspheres are thermosetting and thermoplastic resin hollow microspheres.

[0015] The mass ratio of MMA, initiator and reducing agent is (200-400):(1-5):(1-5).

[0016] Preferably, the mass ratio of the MMA, initiator and reducing agent is (200-400):1.2:1.

[0017] The PMMA accounts for (5%-30%) of the mass of MMA.

[0018] The initiator is a peroxide initiator, specifically tert-butyl peroxyneodecanoate, benzoyl peroxide, dibutyl peroxydicarbonate, tert-butyl peroxy(2-ethylhexanoate), tert-butyl peroxyacetate, tetramethylbutyl peroxyneodecanoate, dodecyl peroxide, bis(4-butylcyclohexyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, butyl peroxyneodecanoate, dipropyl peroxydicarbonate, diisopropyl peroxydicarbonate, diethoxyethyl peroxydicarbonate, diethoxyhexyl peroxydicarbonate, hexyl peroxydicarbonate, methyl ethyl ketone peroxide, cyclohexanone peroxide, dimethoxybutyl peroxydicarbonate, and bis(3-methoxy-3-methoxybutyl) peroxydicarbonate. Dicarbonate, dibutyl peroxydicarbonate, di(hexadecyl)dicarbonate, ditetradecyl peroxydicarbonate, cumene hydroperoxide, tert-butyl peroxybenzoate, 1,1,3,3-tetramethylbutyl peroxypentanoate, hexyl peroxypentanoate, butyl peroxypentanoate, trimethylhexanoyl peroxide, dimethylhydroxybutyl peroxydecanoate, pentyl peroxydecanoate, tert-butyl peroxypentanoate, pentyl peroxypentanoate, tert-butyl peroxy(2-ethyl)hexanoate, lauroyl peroxide, dilauryl peroxide, didecyl peroxide, peracetic acid, potassium persulfate.

[0019] The initiator comprises a tertiary amine reducing agent, which is one or more of N,N′-dimethylaniline, N,N′-dimethyl-p-methylaniline, N,N′-di(2-hydroxypropyl)-p-toluidine, N-methyl-N-2-hydroxyethyl-p-toluidine, N-methyl-N-(2-methacryloyloxyethyl)aniline, and N-methyl-N-(2-methacryloyloxyethyl)-p-toluidine.

[0020] The curing temperature ranges from room temperature to 200°C, and the curing time is from 10 min to 24 h.

[0021] The beneficial effects of this invention are as follows: Based on the preparation of fiber-reinforced PMMA composite materials, this invention adds hollow microspheres as a sandwich layer to prepare PMMA composite materials. This achieves both sufficient strength and reduced preparation costs, while also achieving lightweighting. The molding process is simple, low-cost, and allows for uniform distribution of hollow microspheres within the sandwich panel layers. This sandwich panel exhibits excellent mechanical properties and good thermal insulation. PMMA sandwich panels are obtained through vacuum infusion. Sandwich panel samples are prepared according to ISO international standards using the sandwich panel of this invention. The resulting fiberglass sandwich panel has a compressive strength of 282.8 MPa and a lateral compressive strength of 346.45 MPa. The obtained fiberglass sandwich panel has a compressive strength of 117.9 MPa and a lateral compressive strength of 476.47 MPa. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a picture of the mold after curing.

[0024] Figure 2 This is a photograph of the glass fiber / hollow microsphere sandwich panel prepared in Example 1.

[0025] Figure 3 This is a cross-sectional electron microscope image of the glass fiber / hollow microsphere sandwich panel prepared in Example 1.

[0026] Figure 4 This is a photograph of the carbon fiber / hollow microsphere sandwich panel prepared in Example 2.

[0027] Figure 5 This is a cross-sectional electron microscope image of the carbon fiber / hollow microsphere sandwich panel prepared in Example 2. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] A continuous fiber / hollow microsphere thermoplastic sandwich panel, the preparation method of which includes the following steps:

[0031] Step 1: Mold cleaning, using anhydrous ethanol to clean the mold; Bag film laying, laying the vacuum bag film on the mold; laying the release cloth on the vacuum bag film, the release cloth being slightly larger than the fiberglass fabric; Guide net laying, laying the guide net on the release cloth, the guide net being the same size as the release cloth; laying the release cloth on the guide net, the release cloth being the same size as the guide net; Laying, orderly laying the fiberglass fabric on the release cloth, with a thickness of 1mm;

[0032] Step 2: Hollow glass microspheres (density 0.3 g / cm³) 3The process involves: 1) Laying out PET square frames (65μm particle size) on fiberglass fabric, filling the frame with hollow glass microspheres and compacting them flat to a thickness of 10mm; 2) Laying out the fiberglass fabric in an orderly fashion on the hollow glass microsphere core layer to a thickness of 1mm; 3) Laying out the release fabric, slightly larger than the fiberglass fabric and able to completely wrap the core panel; 4) Laying out the flow guiding mesh, the same size as the lower release fabric; and 5) Laying out the release film, the same size as the lower flow guiding mesh.

[0033] Step 3: Piping layout. Place the air extraction pipe and the resin injection pipe on both sides of the mold respectively. Insert the plastic pipe into the spiral pipe. Wrap the air extraction pipe with a liquid-proof and breathable membrane. The resin injection pipe is close to one side of the sandwich panel.

[0034] Step 4: Vacuum sealing with bag film. Attach a complete vacuum bag film around the overall mold, connect the vacuum pump to one end of the suction pipe to evacuate the vacuum, and close the suction pipe valve after evacuation. Then, check the vacuum level of the overall mold.

[0035] Step 5: Resin infusion. PMMA / MMA binary resin is used. 24% PMMA granules (molecular weight of 100,000) are added to the MMA monomer and dissolved. The mixture of MMA monomer, benzoyl peroxide (BPO), and N,N′-dimethylaniline (DMA) in a mass ratio of 200:1.2:1 is then infused through a resin infusion tube under vacuum pressure.

[0036] Step 6: Curing process. After vacuum infusion is completed, close the vacuum pipe valve and the resin infusion pipe valve. Place the entire mold in an oven and cure at 35℃ for 8 hours, then cure at 70℃ for 2 hours. The resulting product looks like... Figure 1 As shown.

[0037] Step 7: Demolding to obtain a glass fiber / hollow microsphere sandwich panel, as shown in the image. Figure 2 As shown.

[0038] Example 2

[0039] A continuous fiber / hollow microsphere thermoplastic sandwich panel, the preparation method of which includes the following steps:

[0040] Step 1: Mold cleaning, using anhydrous ethanol to clean the mold; Bag film laying, laying the vacuum bag film on the mold; laying the release cloth on the vacuum bag film, the release cloth being slightly larger than the carbon fiber fabric; Flow guide net laying, laying the flow guide net on the release cloth, the flow guide net being the same size as the release cloth; laying the release cloth on the flow guide net, the release cloth being the same size as the flow guide net; Laying, orderly laying the carbon fiber fabric on the release cloth, with a thickness of 1mm;

[0041] Step 2: Hollow microspheres (density 0.3 g / cm³) 3 The process involves: laying PET square frames (65μm particle size) on carbon fiber fabric, filling the frame with hollow microspheres, and compacting and flattening them; layering with a thickness of 10mm, placing the carbon fiber fabric in an orderly manner on the hollow microsphere sandwich layer, with a thickness of 1mm; laying release fabric, laying release fabric on the carbon fiber fabric, the release fabric being slightly larger than the carbon fiber fabric and able to completely wrap the sandwich panel; laying flow guiding mesh, laying flow guiding mesh on the release fabric, the flow guiding mesh being the same size as the lower release fabric; and laying release film, laying release film on the flow guiding mesh, the release film being the same size as the lower flow guiding mesh.

[0042] Step 3: Piping layout. Place the air extraction pipe and resin injection pipe on both sides of the mold respectively. Insert the plastic pipe into the spiral pipe. Wrap the air extraction pipe with a liquid-insulating and breathable membrane. The resin injection pipe is close to one side of the sandwich panel.

[0043] Step 4: Vacuum sealing with bag film. Attach a complete vacuum bag film around the overall mold, connect the vacuum pump to one end of the suction pipe to evacuate the vacuum, and close the suction pipe valve after evacuation. Then, check the vacuum level of the overall mold.

[0044] Step 5: Resin infusion. PMMA / MMA binary resin is used. 24% PMMA granules (molecular weight of 100,000) are added to the MMA monomer and dissolved. The mixture of MMA monomer, BPO and DMA in a mass ratio of 200:1.2:1 is homogeneous and then infused through the resin infusion tube under vacuum pressure.

[0045] Step 6: Curing process: After vacuum injection is completed, close the vacuum pipe valve and the resin injection pipe valve, put the whole mold into the oven and cure at 35°C for 8 hours, and then cure at 70°C for 2 hours.

[0046] Step 7: Demolding: Obtain carbon fiber / hollow microsphere sandwich panel, the actual product as shown in the image. Figure 4 As shown.

[0047] Figure 3 and 5 The images show scanning electron microscope (SEM) images of the continuous fiber / hollow microsphere sandwich panels prepared in Examples 1 and 2. The images show that the hollow microspheres are uniformly distributed between the fiber fabric layers and bonded together with resin. Sandwich panel samples were prepared according to ISO international standards using the continuous fiber / hollow microsphere sandwich panels prepared in Examples 1 and 2, and their mechanical properties were tested. The results are shown in Table 1. The obtained fiberglass sandwich panel has a compressive strength of 282.8 MPa and a lateral compressive strength of 346.45 MPa. The obtained fiberglass sandwich panel has a compressive strength of 117.9 MPa and a lateral compressive strength of 476.47 MPa.

[0048] Table 1

[0049]

[0050] Example 3

[0051] A continuous fiber / hollow microsphere thermoplastic sandwich panel, the preparation method of which includes the following steps:

[0052] Step 1: Mold cleaning, using anhydrous ethanol to clean the mold; Bag film laying, laying the vacuum bag film on the mold; laying the release cloth on the vacuum bag film, the release cloth being slightly larger than the basalt fiber; Flow guiding net laying, laying the flow guiding net on the release cloth, the flow guiding net being the same size as the release cloth; laying the release cloth on the flow guiding net, the release cloth being the same size as the flow guiding net; Laying up, orderly laying the basalt fiber fabric on the release cloth, with a thickness of 1mm;

[0053] Step 2: Hollow glass microspheres (density 0.5 g / cm³) 3 The process involves: 1) Laying out PET square frames (50μm particle size) on basalt fiber fabric, filling the frame with hollow microspheres and compacting them flat to a thickness of 10mm; 2) Laying out basalt fiber fabric in an orderly manner on the hollow glass microsphere sandwich layer to a thickness of 1mm; 3) Laying out release fabric, slightly larger than the basalt fiber fabric and capable of completely wrapping the sandwich panel; 4) Laying out flow guiding mesh, the same size as the lower release fabric; and 5) Laying out release film, the same size as the lower flow guiding mesh.

[0054] Step 3: Piping layout. Place the air extraction pipe and the resin injection pipe on both sides of the mold respectively. Insert the plastic pipe into the spiral pipe. Wrap the air extraction pipe with a liquid-proof and breathable membrane. The resin injection pipe is close to one side of the sandwich panel.

[0055] Step 4: Vacuum sealing with bag film. Attach a complete vacuum bag film around the overall mold, connect the vacuum pump to one end of the suction pipe to evacuate the vacuum, and close the suction pipe valve after evacuation. Then, check the vacuum level of the overall mold.

[0056] Step 5: Resin infusion. PMMA / MMA binary resin is used. 24% PMMA granules (molecular weight of 100,000) are added to the MMA monomer and dissolved. The mixture of MMA monomer, benzoyl peroxide (BPO), and N,N′-dimethylaniline (DMA) in a mass ratio of 200:1.2:1 is then infused through a resin infusion tube under vacuum pressure.

[0057] Step 6: Curing process. After vacuum injection is completed, close the vacuum pipe valve and resin injection pipe valve, put the whole mold into the oven and cure at 35°C for 8 hours, and then cure at 70°C for 2 hours.

[0058] Step 7: Demolding to obtain a continuous basalt fiber / hollow microsphere sandwich panel.

[0059] Example 4

[0060] A continuous fiber / hollow microsphere thermoplastic sandwich panel, the preparation method of which includes the following steps:

[0061] Step 1: Mold cleaning, using anhydrous ethanol to clean the mold; Bag film laying, laying the vacuum bag film on the mold; laying the release cloth on the vacuum bag film, the release cloth being slightly larger than the fiberglass fabric; Guide net laying, laying the guide net on the release cloth, the guide net being the same size as the release cloth; laying the release cloth on the guide net, the release cloth being the same size as the guide net; Laying, orderly laying the fiberglass fabric on the release cloth, with a thickness of 1mm;

[0062] Step 2: Hollow glass microspheres (density 0.3 g / cm³) 3 The process involves: 1) Laying out PET square frames (65μm particle size) on fiberglass fabric, filling the frame with hollow microspheres and compacting them flat to a thickness of 5mm; 2) Laying out fiberglass fabric in an orderly fashion on the hollow glass microsphere sandwich layer to a thickness of 5mm; 3) Laying out release fabric, slightly larger than the fiberglass fabric and able to completely wrap the sandwich panel; 4) Laying out flow guiding mesh, the same size as the lower release fabric; and 5) Laying out breathable membrane, the same size as the lower flow guiding mesh.

[0063] Step 3: Piping layout. Place the air extraction pipe and the resin injection pipe on both sides of the mold respectively. Insert the plastic pipe into the spiral pipe. Wrap the air extraction pipe with a liquid-proof and breathable membrane. The resin injection pipe is close to one side of the sandwich panel.

[0064] Step 4: Vacuum sealing with bag film. Attach a complete vacuum bag film around the overall mold, connect the vacuum pump to one end of the suction pipe to evacuate the vacuum, and close the suction pipe valve after evacuation. Then, check the vacuum level of the overall mold.

[0065] Step 5: Resin infusion. PMMA / MMA binary resin is used. 5% PMMA granules (molecular weight of 100,000) are added to the MMA monomer and dissolved. The mixture of MMA monomer, tert-butyl peroxide, and N,N′-di(2-hydroxypropyl)-p-toluidine is mixed evenly in a mass ratio of 400:1:5 and then infused through the resin infusion tube under vacuum pressure.

[0066] Step 6: Curing process. After vacuum injection is completed, close the vacuum pipe valve and resin injection pipe valve, put the whole mold into the oven and cure at 80°C for 1 hour, and then cure at 150°C for 1 hour.

[0067] Step 7: Demolding to obtain a continuous glass fiber / hollow microsphere sandwich panel.

[0068] Example 5

[0069] A continuous fiber / hollow microsphere thermoplastic sandwich panel, the preparation method of which includes the following steps:

[0070] Step 1: Mold cleaning, using anhydrous ethanol to clean the mold; Bag film laying, laying the vacuum bag film on the mold; laying the release cloth on the vacuum bag film, the release cloth being slightly larger than the fiberglass fabric; Guide net laying, laying the guide net on the release cloth, the guide net being the same size as the release cloth; laying the release cloth on the guide net, the release cloth being the same size as the guide net; Laying, orderly laying the fiberglass fabric on the release cloth, with a thickness of 5mm;

[0071] Step 2: Hollow ceramic microspheres (density 0.5 g / cm³) 3 The process involves: 1) Laying out PET square frames (40μm particle size) on fiberglass fabric, filling the frame with hollow microspheres and compacting them flat to a thickness of 1mm; 2) Laying out the fiberglass fabric in an orderly fashion on the hollow ceramic microsphere sandwich layer to a thickness of 5mm; 3) Laying out the release fabric, slightly larger than the fiberglass fabric and able to completely wrap the sandwich panel; 4) Laying out the flow guiding mesh, the same size as the lower release fabric; and 5) Laying out the breathable membrane, the same size as the lower flow guiding mesh.

[0072] Step 3: Piping layout. Place the air extraction pipe and the resin injection pipe on both sides of the mold respectively. Insert the plastic pipe into the spiral pipe. Wrap the air extraction pipe with a liquid-proof and breathable membrane. The resin injection pipe is close to one side of the sandwich panel.

[0073] Step 4: Vacuum sealing with bag film. Attach a complete vacuum bag film around the overall mold, connect the vacuum pump to one end of the suction pipe to evacuate the vacuum, and close the suction pipe valve after evacuation. Then, check the vacuum level of the overall mold.

[0074] Step 5: Resin infusion. PMMA / MMA binary resin is used. 30% PMMA granules (molecular weight of 100,000) are added to the MMA monomer and dissolved. The mixture of MMA monomer, dilauroyl peroxide and N-methyl-N-(2-methacryloyloxyethyl)aniline in a mass ratio of 200:5:1 is then infused through the resin infusion tube under vacuum pressure.

[0075] Step 6: Curing process. After vacuum injection is completed, close the vacuum pipe valve and resin injection pipe valve, put the whole mold into the oven and cure at 100℃ for 10 minutes, and then cure at 200℃ for 5 minutes.

[0076] Step 7: Demolding to obtain a continuous fiber / hollow microsphere sandwich panel.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous fiber / hollow microsphere thermoplastic sandwich panel, characterized by, It includes upper and lower fiber fabric layers and a middle hollow microsphere layer, with resin bonding phase filling the spaces between and inside each layer.

2. The method of making a continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 1, wherein, Includes the following steps: (1) Fiber I, hollow microspheres and fiber II are laid sequentially on the mold; (2) Seal the mold and evacuate it to a vacuum; (3) The resin solution is poured into the mold and cured. After demolding, a continuous fiber / hollow microsphere sandwich panel is obtained. The resin solution includes PMMA, MMA, and an initiator.

3. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 2, characterized in that, Fiber I and fiber II are independently selected from any one of glass fiber, carbon fiber, and basalt fiber.

4. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 2, characterized in that, The hollow microspheres are inorganic microspheres and / or organic microspheres.

5. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 2, characterized in that, The inorganic microspheres are one or more of hollow glass microspheres, hollow ceramic microspheres, and carbon hollow microspheres; the organic microspheres include thermosetting and thermoplastic resin hollow microspheres.

6. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to any one of claims 2-5, characterized in that, The mass ratio of MMA, initiator and reducing agent is (200-400):(1-5):(1-5).

7. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 6, characterized in that, The PMMA accounts for 5-30% of the mass of MMA.

8. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 6, characterized in that, The initiator is a peroxide initiator, specifically tert-butyl peroxyneodecanate, benzoyl peroxide, dibutyl peroxydicarbonate, tert-butyl peroxy(2-ethylhexanoate), tert-butyl peroxyacetate, tetramethylbutyl peroxyneodecanate, dodecyl peroxy, bis(4-butylcyclohexyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, butyl peroxyneodecanate, dipropyl peroxydicarbonate, diisopropyl peroxydicarbonate, diethoxyethyl peroxydicarbonate, diethoxyhexyl peroxydicarbonate, hexyl peroxydicarbonate, methyl ethyl ketone peroxide, cyclohexanone peroxide, dimethoxybutyl peroxydicarbonate, and bis(3-methoxy-3-methoxybutyl peroxydicarbonate). The following are some of the following: dicarbonate peroxide, dibutyl peroxide dicarbonate, di(hexadecyl) peroxide dicarbonate, ditetradecyl peroxide dicarbonate, cumene hydroperoxide, tert-butyl peroxide, 1,1,3,3-tetramethylbutyl peroxyneopentate, hexyl peroxyneopentate, butyl peroxyneopentate, trimethylhexanoyl peroxide, dimethylhydroxybutyl peroxyneopentate, pentyl peroxyneopentate, tert-butyl peroxyneopentate, pentyl peroxyneopentate, tert-butyl peroxyneopentate, tert-butyl peroxyneopentate, tert-butyl peroxyneopentate, tert-pentyl peroxyneopentate, tert-pentyl peroxyneopentate, lauroyl peroxide, dilauryl peroxide, didecyl peroxide, peracetic acid, and potassium persulfate.

9. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 8, characterized in that, The initiator comprises a tertiary amine reducing agent, which is one or more of N,N′-dimethylaniline, N,N′-dimethyl-p-methylaniline, N,N′-di(2-hydroxypropyl)-p-toluidine, N-methyl-N-2-hydroxyethyl-p-toluidine, N-methyl-N-(2-methacryloyloxyethyl)aniline, and N-methyl-N-(2-methacryloyloxyethyl)-p-toluidine.

10. The method for preparing the continuous fiber / hollow microsphere thermoplastic sandwich panel according to claim 2, characterized in that, The curing temperature ranges from room temperature to 200℃, and the curing time is from 10 min to 24 h.

Images