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Journal of Polymer Research

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01-02-2021 | ORIGINAL PAPER

Effect of mandrel rotation speed on morphology and mechanical properties of polypropylene pipes produced by rotational shear

Authors: Junjun Wu, Zexiang Xie, Hao Yang, Minghao Yang, Kaizhi Shen, Qiang Fu, Xueqin Gao

Published in: Journal of Polymer Research | Issue 2/2021

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Abstract

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.

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Title: Effect of mandrel rotation speed on morphology and mechanical properties of polypropylene pipes produced by rotational shear
Authors: Junjun Wu
Zexiang Xie
Hao Yang
Minghao Yang
Kaizhi Shen
Qiang Fu
Xueqin Gao
Publication date: 01-02-2021
Publisher: Springer Netherlands
Published in: Journal of Polymer Research / Issue 2/2021
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI: https://doi.org/10.1007/s10965-020-02366-0

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