To research the role of mandrel rotation speed on the morphology and mechanical properties of polypropylene (PP) pipes, a self-made rotational shear system (RSS) was applied in this study to manufacture plastic pipes with improved hoop tensile strength through applying hoop shear on the pipes using a rotational mandrel. Morphology study results indicated that different morphologies of the PP pipes were produced when the mandrel rotated at 0 rpm, 2 rpm, 4 rpm, 6 rpm, 8 rpm and 10 rpm. The tensile strength and elongation at break of the pipes were found to increase rapidly with the rotation speed and the properties peaked at 6 rpm. At this speed, the tensile strength and elongation at break increased by 4.1% and 727%, respectively. The high mechanical and thermal performance of the pipe produced at 6 rpm was attributed to the grains begin to refine and the thickness of amorphous region increases throughout the pipe wall.

为了研究芯棒旋转速度对聚丙烯（PP）管道的形态和力学性能的影响，本研究采用自制的旋转剪切系统（RSS）通过在管道上施加环向剪切来制造具有改善的环向拉伸强度的塑料管。使用旋转心轴的管道。形态研究结果表明，当心轴以0 rpm，2 rpm，4 rpm，6 rpm，8 rpm和10 rpm旋转时，会产生不同形状的PP管。发现管的抗张强度和断裂伸长率随着旋转速度而迅速增加，并且性能在6 rpm达到峰值。在该速度下，抗张强度和断裂伸长率分别增加了4.1％和727％。