In-situ preparation method of ceramic whisker/nylon composite material
A technology for nylon composite materials and ceramic whiskers, which is applied in the field of preparing whisker/nylon composite materials by in-situ hydrolysis polymerization, which can solve the problem of reducing the reinforcement effect of whiskers, making it difficult to achieve uniform dispersion of whiskers, and difficult to achieve uniform dispersion of whiskers And other problems, to achieve the effect of high modulus, good impact toughness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0022] Silicon nitride whisker / nylon 6 system
[0023] The monomer of the system is caprolactam, and the ceramic whiskers are silicon nitride whiskers. Mix 5 parts of silicon nitride whiskers with 100 parts of caprolactam, 50 parts of water, and 0.5 parts of benzoic acid, and then add them to the polymerization kettle. The temperature was raised to 240°C, the pressure was raised to 2.0Mpa, the pre-polymerization reaction time was 8 hours, and then the gas was slowly exhausted to reduce the pressure of the polymerization tank to normal pressure. After polymerization under normal pressure for 2 hours, carry out polymerization under reduced pressure at 250°C. The pressure of the polymerization tank is 2000 Pa. After the viscosity is constant, the reaction is completed. Extruded into strips, water-cooled and pelletized to obtain finished pellets.
[0024] In order to better illustrate the superiority of the present invention, a sample prepared by atmospheric pressure in-situ pol...
Embodiment 2
[0030] Silicon nitride whisker / nylon 66 system
[0031] The nylon monomer of this system is nylon 66 salt, 5 parts of silicon nitride whiskers, 100 parts of nylon 66 salt, 50 parts of water, 0.5 part of benzoic acid (molecular weight regulator), 0.1 part of antioxidant 168 are added to the polymerization kettle Pre-polymerize at 230°C and 2.6MPa for 4 hours, then raise the temperature to above 260°C and exhaust to normal pressure, after 1 hour of normal compression polymerization, reduce pressure and polymerize at 300°C and 1000Pa for 2 hours until the viscosity is constant Post-polymerization ends. Pure nylon 66 was prepared by the same method as a comparison sample without adding silicon nitride whiskers. The mechanical properties of nylon 66 and silicon nitride whisker / nylon 66 composite materials are compared in Table 2.
[0032] Table 2 The mechanical properties of pure nylon 66 and silicon nitride whisker / nylon 66 composites when the silicon nitride whisker content is 5...
Embodiment 3
[0036] Potassium titanate whisker / nylon 12 system
[0037] Mix 50 parts of potassium titanate whiskers with 100 parts of laurolactam, 225 parts of water, and 1 part of adipic acid, and then add them to the polymerization kettle. The temperature was raised to 260°C, the pressure was raised to 3.2Mpa, the pre-polymerization reaction time was 14 hours, and then the gas was slowly exhausted to reduce the pressure of the polymerization tank to normal pressure. After 4 hours of polymerization under normal pressure, polymerize under reduced pressure at 300°C. The pressure of the polymerization tank is 6000 Pa. After the viscosity is constant, the reaction is completed. Extruded into strips, water-cooled and pelletized to obtain finished pellets.
PUM
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| modulus | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More