Question

The melting temperature of Nylon 6 fiber is __________.

• A. 180° C
• B. 120° C
• C. 218° C
• D. 265° C

Hint:

Memorize the approximate melting points of major synthetic fibers: - Polypropylene: \(\sim\)165°C - Nylon 6: \(\sim\)220°C - Polyester (PET): \(\sim\)260°C - Nylon 6,6: \(\sim\)265°C Note that Nylon 6,6 has a higher melting point than Nylon 6.

Answer 1

The Correct Option is C

Step 1: Recall the melting points of common synthetic fibers. The melting temperature (Tm) is a key physical property that determines the conditions under which a fiber can be processed and used (e.g., ironing temperature). 
 

Step 2: Compare the melting points of Nylon 6 and Nylon 6,6. Both are common polyamides, but their structures give them different melting points. 

- Nylon 6: Has a melting point in the range of 215-220°C. 

- Nylon 6,6: Has a higher melting point in the range of 260-265°C due to its more regular structure allowing for more efficient hydrogen bonding. 

- Polyester (PET): Has a melting point around 255-260°C.

Step 3: Select the correct option. Based on the known physical data, the melting temperature of Nylon 6 is approximately 218°C. The value of 265°C corresponds to Nylon 6,6.