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Application of molybdenum disulfide in nylon

AUTHOR: TIME:2020-06-08 CLICK:537
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Application of molybdenum disulfide in nylon

Nylon rods are an important engineering plastic that can replace wear-resistant parts of mechanical equipment and copper and alloys as wear-resistant parts of equipment. It has good toughness, strong wear resistance, oil resistance, shock resistance, tensile strength and bending strength, and has the characteristics of low water absorption and good dimensional stability, so it is used to process various wear-resistant high-strength parts. Suitable for making wear-resistant parts, transmission structural parts, household appliances parts, automobile manufacturing parts, screw textile machinery parts, chemical machinery parts, chemical equipment. Such as turbines, gears, bearings, impellers, cranks, instrument panels, drive shafts, valves, blades, screw rods, high-pressure washers, screws, nuts, sealing rings, shuttles, sleeves, sleeve connectors, etc.

 

And nylon 66+MOS2 (gray black): This nylon is filled with molybdenum disulfide. Compared with nylon 66, its rigidity, hardness and dimensional stability have improved, but the impact strength has decreased. The effect of grain formation improves the crystal structure, which improves the load bearing and wear resistance of the material.

PA6+MOS2 (grey-black): containing molybdenum disulfide powder, which can improve the load-bearing capacity and wear resistance of unmodified cast nylon without affecting the impact resistance and fatigue resistance. Gears, bearings, star wheels and sleeves.

With the increase of MOS2 content, the wear resistance of the composite material has been significantly improved. The covalent bond of the molybdenum element and the sulfur element. During the friction process, as friction heat is generated, a part of the sulfur atoms and the contact surface metal It forms metal sulfide, adheres to the surface of the friction surface, and forms a complete film with lubricating effect. With the increase of MOS2 content, the faster the speed and degree of film formation, the less wear and tear will occur, reaching 25 %, the wear reaches the lowest value. When it is increased to more than 25%, the abrasion begins to increase, which may be due to the thickening of the formed film, which is related to easy peeling during the friction process.

Conclusion: 

1. As the amount of MOS2 increases, the tensile strength of its modified nylon 66 continues to increase, the heat deformation temperature continues to increase, and the surface impact strength continues to decrease.

2. Within a certain amount of MOS2 (10-25%), it can improve the fluidity of nylon 66 material.

3.The wear resistance of MOS2 modified pa66 material is better. As the amount of MOS2 increases, its wear gradually decreases.


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