Abstract
Measurements of resilience were made on Nylon 66 and Nylon 6 over the temperature range of -70°C-250°C. In Nylon 66, three dispersion regions, centered at 220°C, 95°C and -25°C, were found, and in Nylon 6, dispersions were found at 70°C and -10°C--30°C. The dispersion at 220°C in Nylon was associated with transition of crystalline structure that the chain packing became more symmetrical. Other dispersion regions were associated with transition of amorphous part. From the estimated apparent activation energy, γ transition was corresponded with motion of polymethylene chains between amide radical, β transition with main chains including one amide radical, and α transition with segment including about 4-5 amide radicals.
