Multiple Preparation Methods for Preparing Epoxy Matrix Resins

Specific implementation method 23: This implementation method is a prepreg, which is made of epoxy matrix resin and SW110 glass fiber woven fabric according to specific implementation method 22. The mass content of volatile matter is less than 1%, and the mass content of epoxy matrix resin is 37%~43%.

The preparation method of the prepreg of this embodiment is as follows:

1. Preparation of epoxy matrix resin: prepare the epoxy matrix resin according to the preparation method recorded in the specific embodiment 22;

2. Preparation of prepreg: a. Hang the single-sided release paper onto the single-sided release paper winding roller shaft 1, middle roller shaft 5, and single-sided release paper winding roller shaft 4 in order to form a transmission connection between the single-sided release paper winding roller shaft 1, middle roller shaft 5, and single-sided release paper winding roller shaft 4. Then, hang the double-sided release paper onto the double-sided release paper winding roller shaft 2, middle roller shaft 5, and product winding roller shaft 3 in order to make the double-sided release paper winding roller shaft 2 The intermediate roller shaft 5 and the product winding roller shaft 3 form a transmission connection, and then the fiber woven fabric is set between the single-sided release paper and the double-sided release paper between the single-sided release paper winding roller shaft 1 and the double-sided release paper winding roller shaft 2. The single-sided release paper contacts the intermediate roller shaft 5, and the single-sided release paper winding roller shaft 1 and the double-sided release paper winding roller shaft 2 are preheated to 75~85 ° C;

b. Pour the epoxy matrix resin prepared in step one into the "V-shaped" space formed by the single-sided release paper winding roller shaft 1 and the fiber woven fabric, and then activate the device to allow the fiber woven fabric and epoxy matrix resin to pass through the gap between the single-sided release paper winding roller shaft 1 and the double-sided release paper winding roller shaft 2, obtaining prepregs with single-sided release paper and double-sided release paper adhered to both sides, respectively, Control the distance between single-sided release paper winding roller shaft 1 and double-sided release paper winding roller shaft 2 to be 0.15~0.2mm, the linear speed of double-sided release paper winding roller shaft 2 to be 200m/h, and the temperature of epoxy matrix resin to be between 75~85 ° C;

c. Under the action of the single side release paper winding roller shaft 4, the single side release paper is peeled off, and at the same time, the product winding roller shaft 3 rolls the prepreg with double-sided release paper adhered to one side, completing the preparation of the prepreg. The number of parts in the B-order resin obtained from step 2 of step 1, step c, is the same as the benchmark used for weighing in step a.

The preparation method of this embodiment adopts the device recorded in specific embodiment 20.
At least 3 layers of prepreg blank obtained by stacking the prepreg obtained in this embodiment are cured for 3 hours at 120 ° C using a hot pressing tank process to obtain a composite laminate. The obtained composite laminate has a tensile strength of 540.2 MPa and a tensile modulus of 24.8 GPa; Bending strength 750MPa, bending modulus 25.9GPa; The layer shear strength is 76.5MPa.

Specific implementation method 24: This implementation method is an epoxy matrix resin, which is composed of 40 parts by weight of F-44 aldehyde epoxy resin, 60 parts by weight of E-51 epoxy resin, 3 parts by weight of core shell polymer, 16 parts by weight of 4,4 '- diaminodiphenylsulfone, a curing agent, 8 parts by weight of dicyandiamide curing agent, and 5.0 parts by weight of 3-phenyl-1,1-dimethylurea curing accelerator. The core shell polymer is made of polybutadiene rubber soft core, Hard shell with polymethyl methacrylate.

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