The figure below depicts the stress-strain plots for several condensation polymers. Compare the behavior of Kevlar and Nylon, which is thermoset and which is thermoplastic? Relate their behavior to their structures. Discuss the deformation of both polymers.
4000
Aramid/Kevlar
3000 Tensile strength (N/mm²) Steel 2000 1000
Polyester
Nylon
T 5
U 10 15 Elongation (%)
T 20
0