The crystallizing rate for the powder melt at constant cooling rate was quicker, its crystallizing peak was higher and sharper, and its super cooling degree was lower.

• 粉末经过预结晶、干燥之后并未形成高熔点物，但其粘度高于干切片，可能发生了部分固相缩聚，易造成纺丝熔体不均匀。