High-weatherability epoxy resin used for composite materials
An epoxy resin and composite material technology, applied in the field of polymer materials, can solve the problems of loss of physical and mechanical properties, microstructure damage, material aging and discoloration, etc., and achieve the effects of low cost, simple preparation method, and excellent discoloration resistance.
Inactive Publication Date: 2018-03-13
梁概泉
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AI Technical Summary
Problems solved by technology
[0002] When fiber-reinforced epoxy resin composite products are used outdoors, they will be affected by climatic factors such as light, heat, oxygen, humidity, and moisture, which will cause damage to the microstructure, lose their original physical and mechanical properties, and also cause aging and discoloration of the material. , eventually loses use value
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0020] Prepare a kind of epoxy resin for high weather resistance composite material of the present invention by the raw material of following mass parts:
[0021] Polystyrene resin: 100 parts;
[0022] Polytetrahydrofuran: 50 parts;
[0023] Silicon nitride: 200 parts;
[0024] Ethylene glycol: 1 part;
[0025] Benzyldimethylamine: 1 part.
[0026] Concrete preparation process steps:
[0027] Mix polystyrene resin and polytetrahydrofuran at 130°C for 30 minutes at a speed of 200r / min; filter, add silicon nitride to the filtrate, mix and stir at room temperature for 5 minutes at a speed of 200r / min, add ethyl The diol and benzyldimethylamine were mixed and stirred at room temperature for 5 minutes at a speed of 200 r / min. The obtained resin has a viscosity of 250mPa·s at 25°C, and has good manufacturability; the flexural strength of the resin cast body is 90MPa, and the flexural modulus is 3.44GPa.
[0028] The casting body of the obtained resin was tested according to GB...
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Abstract
The invention discloses a high-weatherability epoxy resin used for composite materials. The high-weatherability epoxy resin used for composite materials is prepared via following steps: polystyrene resin and polytetrahydrofuran are subjected to stirring reaction for 30 to 40min at 120 to 140 DEG C, and filtering is carried out; silicon nitride is added into an obtain filtrate, and an obtained mixture is stirred to be uniform at 20 to 30 DEG C; a polyol and a catalyst are added, and stirring mixing is carried out for 5 to 10min at 20 to 30 DEG C so as to obtain the high-weatherability epoxy resin. The high-weatherability epoxy resin is prepared from, by mass, 95 to 105 parts of polystyrene resin, 50 to 80 parts of polytetrahydrofuran, 200 to 230 parts of silicon nitride, 1 to 1.5 parts of the polyol, and 1 to 1.5 parts of the catalyst. The formula and the preparation method of the high-weatherability epoxy resin used for composite materials are simple; the cost is low; the manufacturability is excellent; the mechanical properties of prepared fiber enhanced epoxy resin composite materials are excellent; discoloration resistance is excellent; and the weatherability is excellent.
Description
technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an epoxy resin for composite materials with high weather resistance. Background technique [0002] When fiber-reinforced epoxy resin composite products are used outdoors, they will be affected by climatic factors such as light, heat, oxygen, humidity, and moisture, which will cause damage to the microstructure, lose their original physical and mechanical properties, and also cause aging and discoloration of the material. , and eventually lose its use value. Climatic factors will affect the three aspects of the matrix, internal fibers, and composite interface of the composite material, among which the weather resistance of the matrix plays a major role in the weather resistance of the composite material. Due to the presence of benzene rings and double bonds in the molecular structure of the bisphenol A epoxy resin commonly used in composite materials, the benzene ri...
Claims
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IPC IPC(8): C08G59/02
CPCC08G59/022
Inventor 梁概泉
Owner 梁概泉