SOLID-STATE CRYSTALLIZATION AND THERMAL RELAXATION IN NYLON-1010

Quenched nylon 1010 was taken as a sample. Through demonstration that the exothermic peak in the DSC curve is a cold-crystallization peak, the effects of isothermal-crystallization periods and isochronal-crystallization temperatures on the cold-crystallization peak were studied. The effects of annealing temperatures and periods on the thermal relaxation peak were studied. It turned out that the rate of solid-state crystallization is higher in a short period of isothermal crystallization than that in a long period, which possibly results from new hydrogen-bond formation. The solid-state crystallization proceeds easily at higher temperature; the optimum crystallization temperature is 315 K. The temperature range between 277 K and 284 K is a sensitive one as concerns thermal relaxation, the most sensitive point being 281 K.