Preparation method of ultra-tough and cold-resistant nano-particle modified nylon composite material

Abstract

The invention relates to a preparation method of ultra-tough and cold-resistant nano-particle modified nylon composite material. The preparation method comprises the following steps: enabling unsaturated double bond monomers including one or more of cis-butenedioic anhydride, acrylonitrile, methacrylic acid and vinyl acetate, an initiator including one or more of dibenzoyl peroxide, azobisisoheptonitrile and tert-butyl peroxybenzoate to be subjected to polymerization reaction with polypropylene; performing reflux extraction and refinement with acetone to obtain a polymer composite compatilizer, performing surface modification on slurry of nano-particles and water, feeding the surface modified slurry and nylon masterbatch into an internal mixer, adding a product to a twin-screw extruder, performing plasticizing and extruding braces, cooling the braces to room temperature, and granulating and drying the braces to obtain the composite material; introducing nano-particles on the basis of nylon taken as a matrix, performing coupling treatment by the surface polymer composite compatilizer and then performing modification. Interfacial adhesion of the nano-particles in the nylon matrix isimproved, the dispersion property is improved, the crystallization rate is increased, and accordingly, mechanical property, toughness, cold resistance and weather resistance of ropes made of the composite material 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