The results show that lamellae rows are parallel to each other and perpendicular to the extrusion direction when polypropylene melt crystallized under stress field.

• 结果表明,应力场下聚丙烯熔体结晶,得到的硬弹性聚丙烯具有垂直于挤出方向而又平行堆积的片晶结构(即排状堆积片晶)。