CN110696389A - Fiber reinforced thermosetting composite material preformed body curing method - Google Patents
Fiber reinforced thermosetting composite material preformed body curing method Download PDFInfo
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- CN110696389A CN110696389A CN201911140502.3A CN201911140502A CN110696389A CN 110696389 A CN110696389 A CN 110696389A CN 201911140502 A CN201911140502 A CN 201911140502A CN 110696389 A CN110696389 A CN 110696389A
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- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 93
- 239000000835 fiber Substances 0.000 title claims abstract description 85
- 238000001723 curing Methods 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 69
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 66
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000011259 mixed solution Substances 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 18
- 239000004945 silicone rubber Substances 0.000 claims abstract description 16
- 239000004944 Liquid Silicone Rubber Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 230000002787 reinforcement Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 230000000452 restraining effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000004634 thermosetting polymer Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
A fiber reinforced thermosetting composite material preformed body curing method comprises the steps of firstly mixing and stirring two-component liquid silicone rubber to obtain a silicone rubber mixed solution, and vacuumizing; then coating or spraying a release agent on the surface of the fiber reinforced thermosetting composite material preformed body, placing the preformed body at the bottom of a holding container, pouring a silicon rubber mixed solution into the holding container until the fiber reinforced thermosetting composite material preformed body is completely immersed, standing the preformed body in a room-temperature or low-temperature heating environment, and vulcanizing the silicon rubber mixed solution to form a solid silicon rubber block wrapping and restraining the fiber reinforced thermosetting composite material preformed body; finally, the heating temperature is raised to 100-150 ℃, and the temperature is kept for 1-2 hours; then raising the heating temperature to 150-; reducing the temperature to room temperature, taking out the solid silicon rubber block, and stripping silicon rubber to obtain a cured finished product; the invention realizes the curing reaction of the thermosetting prepolymer in the fiber reinforced thermosetting composite material preformed body and ensures that the original form of the preformed body is kept unchanged.
Description
Technical Field
The invention relates to the technical field of composite material curing, in particular to a fiber reinforced thermosetting composite material preformed body curing method.
Background
The fiber reinforced thermosetting composite material adopts chopped or continuous fibers as a reinforcement body and thermosetting resin as a matrix, and has the characteristics of high specific strength and specific modulus, high rigidity and hardness, good corrosion resistance and temperature resistance and the like by virtue of the excellent physical and chemical properties of the fibers and the thermosetting polymer. Different from common thermoplastic resins (such as polylactic acid (PLA), acrylonitrile-butadiene-styrene copolymer (ABS), nylon (PA) and the like), the thermosetting polymer forms irreversible, stable and firm chemical bonding after curing, and due to deep polymerization and crosslinking among molecular chains, the fiber-resin interface and interlayer bonding can be obviously improved, and the properties such as strength, modulus, rigidity and the like can be greatly improved, so that the application requirements in the engineering field can be met, and the thermosetting polymer is widely applied to the fields of automobiles, buildings, sports and aerospace.
However, when using thermosetting polymers as matrix, another difficulty is introduced, namely the curing reaction. Currently, autoclave curing is still the most common curing method for fiber reinforced thermosetting composite materials, and a fiber reinforced thermosetting composite material preform is sealed on a mold with a certain shape by a vacuum bag and then placed in an autoclave, and the curing reaction of a thermosetting prepolymer is completed and the thermosetting prepolymer is molded into a shape required by design through the steps of heating, pressurizing, heat preservation, curing, cooling, pressure relief, demolding and the like in a vacuum environment. However, the thermosetting process has the defects of low production efficiency, high manufacturing cost, large energy loss, environmental pollution, limitation on the size of the autoclave, limitation on the shape complexity and the mould and the like. Therefore, the development of a low-cost, non-mold, green and environment-friendly curing method which can not only maintain the original shape of the fiber reinforced thermosetting composite material preformed body, but also complete the curing reaction of the thermosetting prepolymer is proposed and developed, which becomes the first problem to be solved in the current composite material manufacturing process.
There is no disclosure of relevant literature on a method or apparatus for curing a fiber reinforced thermoset composite preform.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a curing method of a fiber reinforced thermosetting composite material preformed body, which realizes the curing reaction of a thermosetting prepolymer in the fiber reinforced thermosetting composite material preformed body and ensures that the original form of the preformed body is maintained.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of curing a fibre reinforced thermoset composite preform comprising the steps of:
step one, adopting two-component liquid silicone rubber as a raw material, mixing the two liquid components according to a curing ratio, uniformly stirring to obtain a silicone rubber mixed solution, and performing vacuumizing bubble-discharging treatment on the silicone rubber mixed solution by using an external vacuum pump, wherein the vacuum pressure is-100 to 0kPa, and the vacuumizing time is 0 to 30 minutes;
coating or spraying a release agent on the surface of the fiber reinforced thermosetting composite material preformed body, placing the preformed body at the bottom of a containing container, slowly pouring the vacuumized silicon rubber mixed solution into the containing container from one corner until the fiber reinforced thermosetting composite material preformed body is completely immersed, standing for 1-6 hours in a low-temperature heating environment at room temperature (25 ℃) or below 60 ℃, and completely vulcanizing the silicon rubber mixed solution to form a solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body;
step three, utilizing an oven or a heating plate to lift the heating temperature of the solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material pre-forming body to 150 ℃, and preserving the heat for 1-2 hours; then raising the heating temperature to 150-; and (4) reducing the temperature to room temperature (25 ℃), taking out the solid silicon rubber block, and stripping silicon rubber to obtain a cured fiber reinforced thermosetting composite material finished product.
The two-component liquid silicone rubber in the first step is condensed type or addition type two-component liquid silicone rubber, the curing ratio of the condensed type two-component liquid silicone rubber is 100:2-5, the curing ratio of the addition type two-component liquid silicone rubber is 10-1:1, and the A, B components in the two components are uniformly mixed according to the curing ratio, so that the operation time is 30-60 minutes.
The fiber reinforced thermosetting composite material preformed body in the second step is prepared by automatic laying, winding, weaving, hand laying or 3D printing, the components of the fiber reinforced thermosetting composite material preformed body comprise a fiber reinforcement body, a thermosetting prepolymer and a curing agent, and the fiber reinforcement body is chopped fibers, continuous fibers or a mixture of the chopped fibers and the continuous fibers; the thermosetting prepolymer is a high molecular weight thermosetting epoxy resin prepolymer which does not undergo a curing reaction, is in a glass state or a high-elastic state under the low-temperature heating condition of room temperature (25 ℃) or below 60 ℃, and is gradually reduced in intermolecular force to be molten into a viscous state when the heating temperature is raised to above 60 ℃; the curing agent is a high-temperature latent heat initiation curing agent, and the temperature range of the curing reaction between the curing agent and the thermosetting prepolymer is 150-200 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1) aiming at the curing requirement and the complex and changeable component form of the fiber reinforced thermosetting composite material preformed body, the invention firstly vulcanizes the two-component liquid silicone rubber at low temperature, restrains the original form of the fiber reinforced thermosetting composite material preformed body, then adopts the medium temperature to promote the melting of the resin, and finally completes the curing by using the mode of initiating polymerization crosslinking at high temperature, thereby solving the problem that the shaping and the curing of the fiber reinforced thermosetting composite material preformed body are in conflict.
2) The invention adopts a gradient temperature curing mode, vulcanizes the two-component liquid silicone rubber at a low temperature of below 60 ℃ to form a fully-laminated supporting structure, heats at a medium temperature of 100 ℃ and 150 ℃ to promote the flow of molten resin, enhances the infiltration of fibers, fills the defects of internal pores, activates the reaction activity of a curing agent at a high temperature of 150 ℃ and 200 ℃ to initiate a polymerization crosslinking reaction and rapidly cure.
3) The thermal expansion rate of the vulcanized silicone rubber is far higher than that of the fiber reinforced thermosetting composite material, and in the subsequent heating process after vulcanization, the flexible solid silicone rubber is heated to expand, so that the inner and outer walls of the fiber reinforced thermosetting composite material preformed body are uniformly extruded, and a firm fiber-resin interface combination and a compact composite material interlayer structure are formed.
4) The silicon rubber adopted by the invention has excellent temperature resistance, the working temperature range is-60 to 250 ℃, the high-temperature curing requirement of the fiber reinforced thermosetting composite material preformed body is met, and the gradient temperature curing mode is adopted, so that obvious interface separation is formed between the silicon rubber and the fiber reinforced thermosetting composite material preformed body, and the subsequent stripping and removal are convenient.
Drawings
Fig. 1 is a picture of a fiber reinforced thermoset composite preform according to example 1, wherein the left picture is a picture before curing and the right picture is a picture after curing.
Fig. 2 is a picture of the fiber reinforced thermoset composite preform of example 2, wherein the left picture is a picture before curing and the right picture is a picture after curing.
Detailed Description
The present invention is further described below with reference to examples.
Embodiment 1, a method of curing a fiber reinforced thermoset composite preform, comprising the steps of:
step one, adopting condensed type RTV-2 two-component liquid silicone rubber as a raw material, mixing two liquid components according to a curing ratio of 100:3, uniformly stirring to obtain a silicone rubber mixed solution, wherein the viscosity of the silicone rubber mixed solution is 25 Pa.s at room temperature (25 ℃), and performing vacuumizing and bubble-discharging treatment on the silicone rubber mixed solution by using an external circulating vacuum water pump, wherein the vacuum pressure is-80 kPa, and the vacuumizing time is 10 minutes;
spraying a plastic oil release agent on the surface of the fiber reinforced thermosetting composite material preformed body, placing the preformed body at the bottom of a containing container, slowly pouring the vacuumized silicon rubber mixed solution into the containing container from one corner until the fiber reinforced thermosetting composite material preformed body is completely immersed, standing the preformed body for 5 hours at room temperature (25 ℃), completely vulcanizing the silicon rubber mixed solution to form a solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body, wherein the solid silicon rubber block is white and semitransparent, the Shore hardness (A) is 30, and the temperature resistance range is-60-250 ℃;
the fiber reinforced thermosetting composite material pre-forming body is a 2 x 2 honeycomb structure prepared by 3D printing, as shown in a left figure in figure 1, the diameter of an inscribed circle of a honeycomb unit is 10mm, the height of the inscribed circle is 10mm, the components comprise a fiber reinforcement body, a thermosetting prepolymer and a curing agent, and the fiber reinforcement body is 3K continuous carbon fiber; the thermosetting prepolymer is a high-molecular-weight thermosetting epoxy resin prepolymer which does not undergo a curing reaction, is in a glass state at room temperature (25 ℃) and has a softening point of 64-76 ℃; the curing agent is a high-temperature latent heat initiation curing agent, and the lowest reaction temperature of the curing reaction of the curing agent and the thermosetting prepolymer is 150 ℃;
step three, utilizing an oven to lift the heating temperature of the solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body to 120 ℃, and preserving the heat for 2 hours; then the heating temperature is increased to 170 ℃, and the temperature is kept for 2 hours; and (3) reducing the temperature to room temperature (25 ℃), taking out the solid silicon rubber block, and stripping the silicon rubber to obtain a cured fiber reinforced thermosetting composite material finished product, wherein the cured fiber reinforced thermosetting composite material finished product is shown in the right diagram in figure 1.
The beneficial effect of this embodiment does: the embodiment successfully solves the problem that the shaping and curing of the fiber reinforced thermosetting composite material preformed body conflict, realizes the curing reaction of the fiber reinforced thermosetting composite material preformed body and can maintain the original form unchanged; in addition, the thermal expansion rate of the vulcanized silicone rubber is far higher than that of the fiber reinforced thermosetting composite material, and in the subsequent heating process after vulcanization, the flexible solid silicone rubber is heated to expand and uniformly extrude the inner and outer walls of the fiber reinforced thermosetting composite material preformed body, and the structure of a finished product after curing is more compact than that of the preformed body before curing, and the surface quality is more excellent.
Embodiment 2, a method of curing a fiber reinforced thermoset composite preform, comprising the steps of:
step one, adding two-component liquid silicone rubber serving as a raw material, mixing the two liquid components according to a curing ratio of 1:1, uniformly stirring to obtain a silicone rubber mixed solution, wherein the viscosity of the silicone rubber mixed solution is 30 pas at room temperature (25 ℃), and performing vacuumizing bubble-discharging treatment on the silicone rubber mixed solution by using an external rotary-vane vacuum oil pump, wherein the vacuum pressure is-90 kPa, and the vacuumizing time is 10 minutes;
secondly, spraying polytetrafluoroethylene dry lubricating spray on the surface of the fiber reinforced thermosetting composite material preformed body, placing the fiber reinforced thermosetting composite material preformed body at the bottom of a containing container, slowly pouring the vacuumized silicon rubber mixed liquid into the containing container from one corner until the fiber reinforced thermosetting composite material preformed body is completely immersed, heating the silicon rubber mixed liquid at a low temperature of 60 ℃ by using a heating plate, standing the silicon rubber mixed liquid for 2 hours, and completely vulcanizing the silicon rubber mixed liquid to form a solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body, wherein the solid silicon rubber block is brown and non-transparent, the Shore hardness (A) is 40, and the temperature resistance range is 0-200 ℃;
the fiber reinforced thermosetting composite material preform is a cuboid structure prepared by 3D printing, and as shown in the left figure in figure 2, the length, the width and the height are respectively 20 multiplied by 10 multiplied by 5mm3The components comprise a fiber reinforcement, a thermosetting prepolymer and a curing agent, wherein the fiber reinforcement is 3K continuous carbon fiber; the thermosetting prepolymer is a high-molecular-weight thermosetting epoxy resin prepolymer which does not undergo a curing reaction, is in a glass state at room temperature (25 ℃) and has a softening point of 64-76 ℃; the curing agent is a high-temperature latent heat initiation curing agent, and the lowest reaction temperature of the curing reaction of the curing agent and the thermosetting prepolymer is 150 ℃;
step three, utilizing a heating plate to raise the heating temperature of a solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body to 120 ℃, and preserving the heat for 1 hour; then the heating temperature is increased to 170 ℃, and the temperature is kept for 1 hour; and (3) reducing the temperature to room temperature (25 ℃), taking out the solid silicon rubber block, and stripping the silicon rubber to obtain a cured fiber reinforced thermosetting composite material finished product, wherein the cured fiber reinforced thermosetting composite material finished product is shown in the right diagram in figure 2.
The beneficial effect of this embodiment does: the embodiment successfully solves the problem that the shaping and curing of the fiber reinforced thermosetting composite material preformed body conflict, realizes the curing reaction of the fiber reinforced thermosetting composite material preformed body and can maintain the original form unchanged; and in a gradient temperature curing mode, obvious interface separation is formed between the silicone rubber and the fiber reinforced thermosetting composite material preformed body, and no silica gel supporting residue is left after subsequent simple stripping and removal.
Claims (3)
1. A fiber reinforced thermosetting composite material pre-forming body curing method is characterized by comprising the following steps:
step one, adopting two-component liquid silicone rubber as a raw material, mixing the two liquid components according to a curing ratio, uniformly stirring to obtain a silicone rubber mixed solution, and performing vacuumizing bubble-discharging treatment on the silicone rubber mixed solution by using an external vacuum pump, wherein the vacuum pressure is-100 to 0kPa, and the vacuumizing time is 0 to 30 minutes;
coating or spraying a release agent on the surface of the fiber reinforced thermosetting composite material preformed body, placing the preformed body at the bottom of a containing container, slowly pouring the vacuumized silicon rubber mixed solution into the containing container from one corner until the fiber reinforced thermosetting composite material preformed body is completely immersed, standing the preformed body for 1 to 6 hours in a low-temperature heating environment at room temperature or below 60 ℃, and completely vulcanizing the silicon rubber mixed solution to form a solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material preformed body;
step three, utilizing an oven or a heating plate to lift the heating temperature of the solid silicon rubber block which completely wraps and restrains the fiber reinforced thermosetting composite material pre-forming body to 150 ℃, and preserving the heat for 1-2 hours; then raising the heating temperature to 150-; and reducing the temperature to room temperature, taking out the solid silicon rubber block, and stripping silicon rubber to obtain a cured fiber reinforced thermosetting composite material finished product.
2. A method of curing a fibre reinforced thermoset composite preform according to claim 1, characterised in that: the two-component liquid silicone rubber in the first step is condensed type or addition type two-component liquid silicone rubber, the curing ratio of the condensed type two-component liquid silicone rubber is 100:2-5, the curing ratio of the addition type two-component liquid silicone rubber is 10-1:1, and the A, B components in the two components are uniformly mixed according to the curing ratio, so that the operation time is 30-60 minutes.
3. A method of curing a fibre reinforced thermoset composite preform according to claim 1, characterised in that: the fiber reinforced thermosetting composite material preformed body in the second step is prepared by automatic laying, winding, weaving, hand laying or 3D printing, the components of the fiber reinforced thermosetting composite material preformed body comprise a fiber reinforcement body, a thermosetting prepolymer and a curing agent, and the fiber reinforcement body is chopped fibers, continuous fibers or a mixture of the chopped fibers and the continuous fibers; the thermosetting prepolymer is a high molecular weight thermosetting epoxy resin prepolymer which does not undergo a curing reaction, is in a glass state or a high-elastic state under the heating condition of room temperature or below 60 ℃, and gradually reduces intermolecular force to be molten into a viscous state when the heating temperature is raised to above 60 ℃; the curing agent is a high-temperature latent heat initiation curing agent, and the temperature range of the curing reaction between the curing agent and the thermosetting prepolymer is 150-200 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111844804A (en) * | 2020-07-20 | 2020-10-30 | 中国人民解放军火箭军工程大学 | Microwave curing process and device for fiber winding composite material |
| CN114379077A (en) * | 2022-01-25 | 2022-04-22 | 西安交通大学 | Low-cost fiber-reinforced thermosetting composite material 3D printing component post-curing method |
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| CN1765010A (en) * | 2003-03-25 | 2006-04-26 | 陶氏康宁东丽株式会社 | Semiconductor device and method of manufacturing thereof |
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| CN110696389B (en) | 2020-07-28 |
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Effective date of registration: 20231129 Address after: 710075 Zone 306, Industrial Incubation Base Office Building B, Chongwen Town, Jinghe New City, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Xi'an Huasheng composite material technology Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |