Forming method of in-situ polymerized carbon fiber reinforced polymethyl methacrylate composites
A polymethyl methacrylate and composite material technology, which is applied in the field of in-situ polymerized carbon fiber reinforced polymethyl methacrylate composite material molding, can solve the problems that the resin shrinkage cannot be solved well, the curing shrinkage rate is high, and the operation is achieved. The effect of large window, good mechanical properties and simple operation of preparation process
Active Publication Date: 2022-04-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the high curing shrinkage rate of this resin, the existing resin transfer molding process cannot solve the resin shrinkage well.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0023] The steps of the in-situ polymerized carbon fiber reinforced polymethyl methacrylate composite material forming method of the present invention are as follows:
[0024] The first step is to calculate the required number of fiber layers according to the target sheet thickness and fiber volume fraction, and cut the carbon fiber cloth to the required size;
[0025] The cavity size of the flat steel mold is 240mm*340mm, so the size of the carbon fiber cloth is 240mm*300mm;
[0026] The carbon fiber cloth chooses T300 carbon fiber plain fabric as the reinforcing phase, and the sizing agent is removed at high temperature before the fiber is used. The thickness of the carbon fiber cloth is 2mm, and the fiber volume fraction is 50%. According to the calculation of the fiber cloth surface density and the fiber body density, the carbon fiber cloth is 9 layers;
[0027] The second step is to calculate the amount of catalyst required for sheet preparation, and use a spray bottle to...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| viscosity | aaaaa | aaaaa |
| bending strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention is a molding method of in-situ polymerized carbon fiber reinforced polymethyl methacrylate composite material. The method is based on the resin transfer molding process. The process of the method includes: injecting the resin monomer into the mold and impregnating the mold The covered carbon fiber cloth, after raising the temperature, polymerizes the resin in the mold cavity to form an integral composite material with carbon fiber. In this method, the resin finger monomer is methyl methacrylate, and the initiation system is an oxidation-reduction system. The oxidation-reduction system is composed of an initiator and a catalyst, and is characterized in that: before the resin monomer is injected into the mold, one component in the oxidation-reduction system is sprayed on the carbon fiber cloth, and the other component is mixed in in the resin monomer. The invention solves the problem of large shrinkage rate of the methyl methacrylate resin, and prepares composite materials with qualified quality. The molding method for preparing the composite material of the invention is simple and convenient, the operation window before preparation is large, and it is suitable for preparing larger-sized composite material parts with long mold filling time.
Description
technical field [0001] The invention relates to an in-situ polymerized carbon fiber reinforced polymethyl methacrylate composite material forming method, which belongs to the technical field of resin-based composite material forming. Background technique [0002] At present, in the preparation of resin-based composite materials, the liquid molding process is one of the commonly used processes. This process method is to place the fiber in a steel mold of a certain size, set up a flow path, inject resin at a certain temperature, and make the resin impregnate the fiber. The temperature is then raised to polymerize the resin in the cavity and form an integral composite part with the fibers. This process can prepare composite material parts with high surface quality and flatness on both sides, and at the same time, the mechanical properties of the parts are high. [0003] Methyl methacrylate resin has a large heat release, and it is difficult to form thermoplastic composites ac...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/48B29C70/54B29K33/04
CPCB29C70/48B29C70/54B29K2033/12
Inventor 张代军龚明刘燕峰李军温嘉轩陈祥宝
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS