The transformation of the spherulites of nylon 1010 has been studied by means of PLM. In cooling process

the nonringed spherulites formed above 195℃ could be changed into the same birefringent ringed spherulites below 181℃.In heating process

positive ringed and nonringed are transformed into positive and negative nonringed forms at 182 and 194℃ respectively and 2-valve spherulites became negative nonringed at 183℃ which returned Into 2-valve at 178℃. When a few kinds of spherulites coexisted

positive

mixed ringed and nonringed could be changed into 2-

asymmetric 4- and 6-valve spherulited in 109-158℃

and all changed into ringed form at 203℃ then melted at 216℃.