CN115819653A - Continuous fiber reinforced PMMA (polymethyl methacrylate) composite material as well as preparation method and application thereof - Google Patents
Continuous fiber reinforced PMMA (polymethyl methacrylate) composite material as well as preparation method and application thereof Download PDFInfo
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- CN115819653A CN115819653A CN202211595407.4A CN202211595407A CN115819653A CN 115819653 A CN115819653 A CN 115819653A CN 202211595407 A CN202211595407 A CN 202211595407A CN 115819653 A CN115819653 A CN 115819653A
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Abstract
The invention provides a continuous fiber reinforced PMMA composite material and a preparation method and application thereof. The invention integrates the low-temperature advantage of redox active polymerization, can realize the bulk polymerization characteristic of the resin component A and the resin component B at normal temperature, does not generate high-temperature implosion to damage the performance of the composite material, and reduces the volatilization of MMA monomers at high temperature; in addition, the viscosity suitable for vacuum infusion can be obtained by only using single monomer for prepolymerization, and the obtained PMMA composite material has excellent mechanical property, can be recycled and has good application value.
Description
Technical Field
The invention belongs to the technical field of resin composite materials, and particularly relates to a continuous fiber reinforced PMMA composite material and a preparation method and application thereof.
Background
With continuous emission of carbon dioxide and drastic increase of greenhouse gases, under the background, china puts forward targets of carbon peak reaching and carbon neutralization, and the utilization of clean energy becomes a necessary trend for development. Wind energy is widely applied as a clean energy source, the existing wind turbine blades are mainly made of continuous fiber reinforced epoxy resin thermosetting composite materials, the composite blades installed at the early stage inevitably face the problem of decommissioning along with the large-scale construction and grid connection of a wind power plant, the tonnage of the decommissioned wind turbine blades per year in the future reaches millions of tons or even thousands of tons, the thermosetting decommissioned composite leaves cannot be naturally degraded, and the problem becomes a serious environmental protection problem.
Compared with thermosetting composite materials, the thermoplastic composite material has the remarkable characteristics of high toughness, high impact resistance, easiness in processing, recyclability and the like, and can be recycled by a melting method and a solvent method or used for the production of injection molding composite materials after being crushed. Methyl Methacrylate (MMA) monomer can be polymerized to form polymethyl methacrylate (PMMA), which is a thermoplastic polymer material with excellent optical property, mechanical property and weather resistance, and a melt impregnation method is usually adopted to prepare the fiber reinforced PMMA composite material, but PMMA still has the disadvantages of difficult flowing at high temperature, poor wettability and inconvenient operation, and the development of liquid thermoplastic resin is a key step.
Patent CN 105906749A proposes a thermoplastic resin-based carbon fiber composite material and a preparation method thereof, wherein an olefin monomer or an olefin monomer composition is mixed with a thermal initiator to obtain a polymerization system, and the carbon fiber material is immersed into the polymerization system for gradual heating reaction to obtain the composite material. The patent CN 111976171A mentions that the reduction auxiliary agent is sprayed on the surface of the carbon fiber in advance, and has the advantages that MMA resin containing BPO peroxide initiator does not polymerize or polymerizes slowly at normal temperature, the resin viscosity is low, and the difficulty of MMA permeating the carbon fiber layer can be reduced theoretically. In practice there may be problems with maldistribution of the reducing agent within the fibre. MMA has a boiling point of 100 ℃ and is volatile, while the prepared resin of the patent has a viscosity of 0.6 mPa.s-1 mPa.s, and MMA monomers with low viscosity are easy to volatilize and are not suitable for a vacuum infusion composite material processing process.
In summary, there is a need for a method for preparing a thermoplastic resin with simple operation, wide process applicability and low tendency to implode, so as to further expand the application range of the thermoplastic resin.
Disclosure of Invention
The invention provides a continuous fiber reinforced PMMA composite material and a preparation method and application thereof, aiming at solving the problems of inconvenient operation of the conventional melting method and implosion during high-temperature polymerization.
The technical scheme adopted by the invention is as follows:
a preparation method of a continuous fiber reinforced PMMA composite material comprises the steps of enabling a peroxide oxidizing agent and an MMA monomer to form a resin component A, enabling a tertiary amine reducing agent and the MMA monomer to form a resin component B, uniformly mixing the component A and the component B before use, performing prepolymerization defoaming, and then enabling the component A and the component B to form the composite material with continuous fibers in a flow guide mode such as vacuum or high pressure. MMA monomer can be polymerized at normal temperature by redox mechanism, and corresponding composite material can be prepared at normal temperature. The preparation method is also suitable for the polymerization and copolymerization of other acrylic resins and the preparation process of related composite materials.
When the peroxide oxidant and the reducing agent in the redox system interact with each other, the reducing agent takes a tertiary amine compound as an example, tertiary amine free radicals can be correspondingly generated, double bonds of MMA monomers are overlapped due to part of electron clouds to initiate MMA polymerization, active terminal groups at chain ends are formed, active PMMA macromolecular chains are finally formed, the active PMMA macromolecular chains can continuously act with the monomers in subsequent polymerization reaction, the induction period of polymerization is shortened, and the polymerization rate is improved.
Preferably, the preparation method of the continuous fiber reinforced PMMA composite material comprises the following steps:
(1) Adding peroxide oxidant accounting for 0.01-5% of the mass of the monomer into an MMA monomer to form a component A; adding a tertiary amine reducing agent accounting for 0.01-5% of the mass of the monomer into an MMA monomer to form a component B, wherein the mass ratio of the A, B component is (2-4): 1, uniformly mixing the obtained A, B components at 10-80 ℃, and carrying out prepolymerization for 0.1-3 hours to obtain a solution for perfusion;
(2) Compounding the obtained solution for perfusion and continuous fibers by a vacuum or high-pressure flow guide forming method, wherein the reaction temperature is 20-100 ℃, curing the solution for perfusion is 1-48 h, and then curing the solution for perfusion is 1-48 h at the temperature of 60-120 ℃ to obtain the composite material, and the volume fraction of the continuous fibers in the composite material is 68-78%.
Further, the MMA monomer is any one or more of acrylic acid, methacrylic acid, methyl methacrylate, butyl methacrylate, acrylamide, and methacrylamide, preferably methyl methacrylate. The method of the invention is also suitable for other monomers with double bonds in the structure, such as styrene and the like.
Further, the peroxide oxidant is one or more of tert-butyl peroxyneodecanoate, benzoyl peroxide, dibutyl peroxydicarbonate, tert-butyl peroxy (2-ethylhexanoate), tert-butyl peroxyacetate, tetramethylbutyl peroxyneodecanoate, lauroyl peroxide, bis (4-butylcyclohexyl) peroxydicarbonate, bis (2-ethylhexyl) peroxycarbonate, butyl peroxyneodecanoate, dipropyl peroxydicarbonate, diisopropyl peroxydicarbonate, diethoxyethyl peroxydicarbonate, diethoxyhexyl peroxydicarbonate, hexyl peroxydicarbonate, methyl ethyl ketone peroxide, cyclohexanone peroxide, dimethoxybutyl peroxydicarbonate, bis (3-methoxy-3-methoxybutyl) peroxydicarbonate, dibutyl peroxydicarbonate, dihexadecyl peroxydicarbonate, ditetradecyl peroxydicarbonate, cumene hydroperoxide, tert-butyl peroxybenzoate, 1,1,3,3-tetramethylbutyl peroxypivalate, hexyl peroxypivalate, butyl peroxypivalate, trimethylhexanoyl peroxide, dimethylhydroxybutyl peroxypivalate, neopentyl peroxypivalate, butyl peroxypivalate, tert-butyl peroxypivalate, lauroyl peroxypivalate, potassium peroxydicarbonate, and potassium peroxydecanoate.
Further, the tertiary amine reducing agent may be one or more selected from the group consisting of N, N ' -dimethylaniline, N ' -dimethyl-p-methylaniline, N ' -bis (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.
Further, the continuous fiber is any one of glass fiber, carbon fiber, mineral source fiber and plant source fiber.
Further, the viscosity of the solution for perfusion in the step (1) is in the range of 100 to 400 mPas.
The invention also discloses the continuous fiber reinforced PMMA composite material prepared by the method.
The invention also comprises the application of the continuous fiber reinforced PMMA composite material.
Further, the continuous fiber reinforced PMMA composite material is used for producing sheets, pipes and bars.
Further, the continuous fiber reinforced PMMA composite material is used in the fields of aviation materials, wind power manufacturing, building materials, furniture decoration, agricultural materials, liquid crystal materials, electronic and electric materials, optical materials, transportation, medical materials, military materials or paint coatings.
The invention has the following beneficial effects:
1. the invention integrates the low-temperature advantage of redox active polymerization, can realize the bulk polymerization characteristic of the A component and the B component of the resin at normal temperature, and the liquid resin formed by mixing the A component and the B component (namely the solution for perfusion prepared in the step (1)) has adjustable and controllable pot life (operation time), is suitable for vacuum perfusion and can obtain the continuous fiber reinforced PMMA composite material with mechanical property equivalent to that of an epoxy composite material.
2. The invention designs A, B two components, and the two single components are not easy to react at room temperature, so the storage and transportation are easy, and the storage time of raw materials can be prolonged; the A and B components can react at normal temperature after being mixed, so that the performance of the composite material cannot be damaged due to implosion, electric energy is not consumed for heating, the design cost and the processing cost of the composite material die are simplified, double cost saving and efficiency improvement are realized, MMA monomer volatilization can be reduced at high temperature in normal temperature operation, VOC (volatile organic compound) emission is reduced, and the environment is protected.
3. According to the invention, a viscosity suitable for vacuum infusion, namely 100-400 mPa & s, can be obtained by using a single monomer through controlled prepolymerization without adding a high polymer in the conventional technology, and a PMMA composite material is finally obtained.
4. The liquid continuous fiber reinforced PMMA composite material prepared by the invention can continue to use common processes and equipment of liquid epoxy thermosetting resin, has high enterprise and market acceptance, can be recycled by a melting method, a solvent method and the like when PMMA is used as a thermoplastic material, and has good environmental protection effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a bar graph of a continuous fiber reinforced PMMA composite of example 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention are commercially available unless otherwise specified.
Example 1
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Benzoyl peroxide 0.0083 g was dissolved in 80 g MMA to form component A, 40 g MMA was mixed with N, N-dimethyl-p-methylaniline 0.0045 g to form component B, A, B was mixed uniformly at room temperature, and prepolymerized 2.8 h to obtain a perfusion solution having a viscosity of 108 mPas.
(2) The resulting infusion solution was introduced into a 6-ply uniaxial glass cloth (30 cm. About.30 cm) having an areal density of 1250 g/m (30 cm) by vacuum infusion under a vacuum pressure of 0.090 MPa 2 After curing for 42 hours at room temperature, heating at 90 ℃ for 5 hours to cure completely, and performing demolding post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 72%.
The continuous fiber reinforced PMMA composite material prepared by the embodiment is used for preparing composite material sample strips according to ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1162.2 MPa, and the bending strength is 1150.3 MPa.
Example 2
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Lauroyl peroxide 0.4509 g was dissolved in 90 g MMA to form component A, 30 g MMA was mixed with N, N-dimethylaniline 0.1512 g to form component B, A, B component was mixed uniformly at 40 ℃ and prepolymerized to 2.0 h to obtain a perfusion solution having a viscosity of 108 mPas.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (30 cm. About.30 cm) having an areal density of 1250 g/m by vacuum infusion under a vacuum pressure of 0.085 MPa 2 And after curing for 25 hours at 40 ℃, heating for 3 hours at 100 ℃ for complete curing, and performing demolding and post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 70%.
The continuous fiber reinforced PMMA composite material prepared by the embodiment is used for preparing composite material splines according to ISO international standards, and the tensile strength of the obtained material in the 0-degree direction is 1350.2 MPa, and the bending strength is 1102.5 MPa.
Example 3
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Cumene hydroperoxide 1.7021 g was dissolved in 85 g MMA to form component a, 34 g MMA was mixed with N, N-dimethylaniline 0.6804 g to form component B, A, B was mixed well at room temperature, and pre-polymerized to 0.6 h to obtain a perfusion solution with viscosity up to 234 mPa · s.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (30 cm. About.30 cm) having an areal density of 1250 g/m by vacuum infusion under a vacuum pressure of 0.087 MPa 2 After curing for 6 hours at room temperature, heating at 110 ℃ for 2 hours to cure completely, and performing demolding post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 68%.
The continuous fiber reinforced PMMA composite material prepared in the embodiment is used for preparing composite material splines according to ISO international standards, and the tensile strength of the obtained material in the 0-degree direction is 1086.5 MPa, and the bending strength is 1063.
Example 4
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Benzoyl peroxide 0.9208 g was dissolved in 92 g MMA to form component A, 42 g MMA was mixed with N, N' -bis (2-hydroxypropyl) p-toluidine 0.2208 g to form component B, A, B component was mixed uniformly at 60 ℃ and prepolymerized to 1.0 h to obtain a perfusion solution having a viscosity of 311 mPas.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (30 cm. About.30 cm) having an areal density of 1250 g/m by vacuum infusion under a vacuum pressure of 0.085 MPa 2 And after curing for 6 hours at 60 ℃, heating for 2 hours at 110 ℃ for complete curing, and performing demolding and post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 78%.
The composite material sample bar shown in fig. 1 is prepared from the continuous fiber reinforced PMMA composite material prepared in the embodiment according to ISO international standard, and the tensile strength of the obtained material in the 0 ℃ direction is 1232.5 MPa, and the bending strength is 1201.0 MPa.
Example 5
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Lauroyl peroxide 2.0012 g was dissolved in 100 g MMA to form component A, 50 g MMA was mixed with N-methyl-N- (2-methacryloyloxyethyl) p-toluidine 0.7512 g to form component B, A, B component was uniformly mixed at 80 ℃ and prepolymerized to 0.3 h to obtain a casting solution having a viscosity of 296 mPas.
(2) And (3) pouring the obtained solution for pouring into a prefabricated body (40 cm by 40 cm) tiled by unidirectional carbon fiber cloth (specification: T700 SC) in vacuum under the vacuum pressure of 0.088 MPa, curing for 3 hours at 80 ℃, heating for 3 hours at 110 ℃, completely curing, and demolding to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 65%.
The composite material sample strip is prepared from the continuous fiber reinforced PMMA composite material prepared by the embodiment according to the ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1971.8 MPa, and the bending strength is 1811.5 MPa.
Example 6
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Tert-butyl peroxybenzoate 1.8124 g was dissolved in 120 g MMA to form component A, 30 g MMA was mixed with N-methyl-N- (2-methacryloyloxyethyl) p-toluidine 0.3125 g to form component B, A, B component was mixed uniformly at 40 ℃ and prepolymerized to 1.2 h to obtain a perfusion solution having a viscosity of 205 mPas.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (40 cm. About.40 cm) having an areal density of 1250 g/m (by vacuum infusion) under a vacuum pressure of 0.095 MPa 2 And after curing for 12 hours at 40 ℃, heating for 6 hours at 80 ℃ to completely cure, and performing demolding and post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 74%.
The continuous fiber reinforced PMMA composite material prepared by the embodiment is used for preparing composite material sample strips according to ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1198.7 MPa, and the bending strength is 1157.8 MPa.
Example 7
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Benzoyl peroxide 0.8801 g and methyl ethyl ketone peroxide 0.4413 g were dissolved in 88 g MMA to form component A, 40 g MMA was mixed with N-methyl-N-2-hydroxyethyl-p-toluidine 0.4012 g to form component B, A, B components were mixed uniformly at room temperature, and pre-polymerization 0.6 h gave a perfusion solution with a viscosity of mPa 313. Multidot.s.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (40 cm by 40 cm) having an areal density of 1250 g/m (40 cm by 40 cm) by vacuum infusion under a vacuum pressure of 0.087 MPa 2 After curing for 5.5 hours at room temperature, heating for 3 hours at 80 ℃ to completely cure, and performing demolding and post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 71%.
The composite material sample strip is prepared from the continuous fiber reinforced PMMA composite material prepared by the embodiment according to the ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1140.7 MPa, and the bending strength is 1122.4 MPa.
Example 8
The embodiment provides a preparation method of a continuous fiber reinforced PMMA composite material, which comprises the following steps:
(1) Benzoyl peroxide 1.0509 g was dissolved in 105 g MMA to form component A, 35 g MMA was mixed with N, N-dimethylaniline 0.5251 and N, N-dimethyl-p-toluidine 0.1759 g to form component B, A, B component was mixed well at room temperature, pre-polymerized 1.0 h to obtain a perfusion solution with a viscosity of 201 mPas.
(2) The resulting infusion solution was introduced into a 6-ply uniaxial glass cloth (40 cm by 40 cm) having an areal density of 1250 g/m (40 cm by 40 cm) by vacuum infusion under a vacuum pressure of 0.09 MPa 2 After curing for 7 hours at room temperature, heating at 110 ℃ for 2 hours to cure completely, and performing demolding post-treatment to obtain the continuous fiber reinforced PMMA composite material, wherein the volume fraction of the fibers is 71%.
The composite material sample strip is prepared from the continuous fiber reinforced PMMA composite material prepared by the embodiment according to the ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1139.4 MPa, and the bending strength is 1134.8 MPa.
Comparative example
Comparison is made with example 6.
(1) A commercially available epoxy resin (available from Dow Sheng Jiang materials science & technology (Shanghai) Ltd. 180/185) of component A100.0 g and component B25.0 g were uniformly stirred at room temperature, and vacuum defoamed to 0.3 h to obtain a perfusion solution having a viscosity of 212 mPas.
(2) The resulting infusion solution was introduced into 6 layers of uniaxial glass cloth (40 cm x 40 cm) having an areal density of 1250 g/m by vacuum infusion under a vacuum pressure of 0.095 MPa 2 After curing for 12 hours at 40 ℃, heating for 6 hours at 80 ℃ for complete curing, and performing demolding post-treatment to obtain the continuous fiber reinforced epoxy composite material, wherein the volume fraction of the fibers is 74%.
The continuous fiber reinforced epoxy resin composite material prepared by the comparative example is used for preparing composite material splines according to the ISO international standard, and the tensile strength of the obtained material in the 0-degree direction is 1019.3 MPa, and the bending strength is 1092.8 MPa. The mechanical properties of the composite material were similar to those of the composite material of example 6 of the present invention, indicating that the present invention successfully produced a thermoplastic composite material comparable to epoxy resin.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (9)
1. A preparation method of a continuous fiber reinforced PMMA composite material is characterized by comprising the following steps: the peroxide oxidant and MMA monomer form resin component A, the tertiary amine reducing agent and MMA monomer form resin component B, the A component and the B component are uniformly mixed before use, pre-polymerized and defoamed, and then the A component and the B component and continuous fibers form the composite material under the flow guide modes of vacuum or high pressure and the like.
2. The method for preparing a continuous fiber reinforced PMMA composite according to claim 1, characterized by the steps of:
(1) Adding peroxide oxidant accounting for 0.01-5% of the mass of the monomer into an MMA monomer to form a component A; adding a tertiary amine reducing agent accounting for 0.01-5% of the mass of the monomer into an MMA monomer to form a component B, wherein the mass ratio of the A, B component is (2-4): 1, uniformly mixing the obtained A, B components at 10-80 ℃, and carrying out prepolymerization for 0.1-3 hours to obtain a solution for perfusion;
(2) Compounding the obtained solution for perfusion and continuous fibers by a vacuum or high-pressure flow guide forming method, wherein the reaction temperature is 10-100 ℃, curing 1-48 h, and then continuously curing 1-48 h at the temperature of 60-120 ℃ to obtain the composite material, and the volume fraction of the continuous fibers in the composite material is 68-78%.
3. The method for preparing a continuous fiber reinforced PMMA composite according to claim 1 or 2, wherein: the peroxide oxidant is one or more of tert-butyl peroxyneodecanoate, benzoyl peroxide, dibutyl peroxydicarbonate, tert-butyl peroxy (2-ethylhexanoate), tert-butyl peroxyacetate, tetramethylbutyl peroxyneodecanoate, lauroyl peroxide, bis (4-butylcyclohexyl) peroxydicarbonate, bis (2-ethylhexyl) peroxycarbonate, butyl peroxyneodecanoate, dipropyl peroxydicarbonate, diisopropyl peroxydicarbonate, diethoxyethyl peroxydicarbonate, diethoxyhexyl peroxydicarbonate, hexyl peroxydicarbonate, methyl ethyl ketone peroxide, cyclohexanone peroxide, dimethoxybutyl peroxydicarbonate, bis (3-methoxy-3-methoxybutyl) peroxydicarbonate, dibutyl peroxydicarbonate, dicetyl peroxydicarbonate, ditetradecyl peroxydicarbonate, cumene hydroperoxide, tert-butyl peroxybenzoate, 1,1,3,3-tetramethylbutyl peroxypivalate, hexyl peroxypivalate, butyl peroxypivalate, trimethylhexanoyl peroxide, dimethylhydroxybutyl peroxyneodecanoate, neopentyl peroxypivalate, butyl peroxypivalate, tert-butyl peroxypivalate, lauroyl peroxydicarbonate, and potassium peroxycaproate.
4. The method for preparing a continuous fiber reinforced PMMA composite according to claim 1 or 2, wherein: the tertiary amine reducing agent is one or more of N, N ' -dimethylaniline, N ' -dimethyl-p-methylaniline, N ' -bis (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.
5. The method for preparing a continuous fiber reinforced PMMA composite according to claim 1 or 2, wherein: the continuous fiber is any one of glass fiber, mineral source fiber, carbon fiber and plant source fiber.
6. The method for preparing a continuous fiber reinforced PMMA composite according to claim 2, wherein: the viscosity range of the solution for perfusion in the step (1) is 100-400 mPa.s.
7. A continuous fiber reinforced PMMA composite prepared by the method of claim 1 or 2.
8. Use of a continuous fiber reinforced PMMA composite according to claim 7, wherein: the continuous fiber reinforced PMMA composite material is used for producing sheets, pipes and bars.
9. Use of a continuous fiber reinforced PMMA composite according to claim 7, wherein: the continuous fiber reinforced PMMA composite material is used in the fields of aviation materials, wind power manufacturing, building materials, furniture decoration, agricultural materials, liquid crystal materials, electronic and electrical materials, optical materials, transportation, medical materials, military materials or paint coatings.
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