Nylon-6 as compared to nylon-66 is
A. Harder
B. More abrasion resistant
C. Having higher melting point
D. None of these
Answer: Option D
Solution (By Examveda Team)
Nylon-6 and Nylon-66 are both types of polyamides but differ in their molecular structure and properties.Nylon-6 is produced from a single monomer, caprolactam, whereas Nylon-66 is made from two monomers: adipic acid and hexamethylenediamine.
Hardness: Nylon-66 is harder than Nylon-6 due to its higher crystallinity and symmetrical structure. So, Option A is incorrect.
Abrasion Resistance: Nylon-66 has better abrasion resistance than Nylon-6 because of its denser molecular packing. Thus, Option B is also incorrect.
Melting Point: Nylon-66 has a higher melting point (around 255–265°C) than Nylon-6 (around 220–230°C) because of stronger hydrogen bonding. Hence, Option C is incorrect.
Conclusion: Since none of the statements are true when comparing Nylon-6 to Nylon-66, the correct answer is Option D: None of these.
This Question Belongs to Chemical Engineering >> Polymer Technology
Nylon66 has 40-45 degree Celsius higher melting point than Nylon6 and less abrasion resistant than Nylon 6 as mentioned in Drydens Polyamide.
Ans is option D
Option-B is right