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The difference between nylon 66 and nylon 6

2023-11-23

The difference between nylon 66 and nylon 6

Nylon 66 (Nylon 66) and Nylon 6 (Nylon 6) are two common nylon materials. They have some differences in chemical structure, properties and applications. Here are their main differences:

Chemical structure:

Nylon 66: Nylon 66 is produced through the polymerization reaction of terephthalic acid and hexamethylenediamine. Each monomer in this chemical structure contains 6 carbon atoms, hence the name nylon 66.
Nylon 6: Nylon 6 is made from caprolactam through polymerization. The monomer in this chemical structure contains 6 carbon atoms, hence the name nylon 6.
Melting point:

Nylon 66: Nylon 66 generally has a higher melting point, giving it higher thermal stability. This allows nylon 66 to maintain better performance in high-temperature environments.
Nylon 6: Nylon 6 has a relatively low melting point but still has good heat resistance. Under some low temperature and high humidity conditions, nylon 6 may perform better than nylon 66.
Water absorbency:

Nylon 66: Nylon 66 is relatively absorbent and has high water absorbency. Performance may be degraded in humid environments.
Nylon 6: Nylon 6 has low water absorbency and is relatively less sensitive to humidity. This allows nylon 6 to remain relatively stable in wet conditions.
Mechanical behavior:

Nylon 66: Nylon 66 generally has higher strength and hardness, as well as better wear resistance, making it suitable for applications requiring high mechanical properties.
Nylon 6: Nylon 6 is relatively low in strength and hardness, but has good toughness and impact properties.
Application areas:

Nylon 66: Due to its high strength, heat resistance and wear resistance, nylon 66 is often used in fields that require high performance, such as automotive parts, industrial parts, and electronic devices.
Nylon 6: Nylon 6 is commonly used in textiles, ropes, plastic parts, electrical insulation and other applications due to its better toughness and lower cost.
In general, there are some differences in chemical structure and properties between nylon 66 and nylon 6, so when selecting materials, their advantages and disadvantages need to be considered based on specific application requirements.

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