A preparation method of super-tough and cold-resistant nano-particle modified nylon composite material

Abstract

The invention relates to a preparation method of a super tough and cold-resistant nano-particle modified nylon composite material, which comprises one or more unsaturated double-bond single-bond compounds selected from maleic anhydride, acrylonitrile, methacrylic acid and vinyl acetate. polymer, one or more initiators including dibenzoyl peroxide, azobisisoheptanenitrile, tert-butyl peroxybenzoate and polypropylene polymerization reaction, and the polymer composite phase is obtained by acetone reflux extraction and purification It is used to modify the surface of the slurry of nanoparticles and water, put it into the internal mixer with the nylon masterbatch, and then add it to the twin-screw extruder to plasticize and extrude the strands. After cooling to room temperature, it is cut into pellets and dried. A composite material is obtained; with nylon as the matrix, nanoparticles are introduced and modified after coupling treatment with a surface polymer composite compatibilizer to improve the interfacial adhesion of nanoparticles in the nylon matrix, improve the dispersion performance and crystallization rate, and refine the crystallization. Thereby, the mechanical properties, toughness, cold resistance and weather resistance of the composite rope are improved.

Description

technical field [0001] The invention relates to a preparation method of a super-tough and cold-resistant nano-particle modified nylon composite material, which belongs to the technical field of modified nylon materials. Background technique [0002] Cables are generally used to tie multi-strand expansion and contraction of ships, and require properties such as tensile resistance, impact resistance, and wear resistance. The raw materials for their production have gradually replaced steel cables, hemp, cotton, and synthetic fibers with polyester, polypropylene, and nylon. And other materials, its performance is also significantly improved. Nylon is a synthetic fiber containing polyamide. It is a general term for thermoplastic resins that contain repeated amide groups -[NHCO]- in the main chain of the molecule. Because nylon materials used for ropes are used in berths and navigation, they are immersed in water for a long time and are exposed to low temperature conditions. Unde...

AI Technical Summary

Problems solved by technology

Nylon is a synthetic fiber containing polyamide. It is a general term for thermoplastic resins that contain repeated amide groups -[NHCO]- in the main chain of the molecule. Because nylon materials used for ropes are used in berths and navigation, they are immersed in water for a long time and are exposed to low temperature conditions. Under this condition, the mechanical properties and shrinkage rate decrease in the orientation direction, and the strain resistance decreases to produce terminal silver cracks, so that the shear band develops into destructive cracks and breaks, resulting in risk of use

[0003] The modified nylon proposed in the prior art includes graphene, silicon carbide crystal modified compound, etc. However, the interface bonding performance of the inorganic modified material at the oil end of the nylon polymer matrix is ​​poor, resulting in poor dispersion and easy agglomeration problems, and the crystallization rate is low, resulting in poor local fracture toughness, the overall performance is unstable after rope formation, and the molecular chain freezes for a long time in a low temperature environment, resulting in a decline in mechanical properties