Construction of Pressure-resistance Polyethylene-based Pipes with Highly Biaxially Oriented Structure and Self-reinforcing Mechanism

Bu-Yong Wu; Yu-Dong Cai; Xiao-Wen Zhao; Lin Ye

doi:10.1007/s10118-022-2879-x

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Construction of Pressure-resistance Polyethylene-based Pipes with Highly Biaxially Oriented Structure and Self-reinforcing Mechanism

RESEARCH ARTICLE | Updated：2023-05-26

- Construction of Pressure-resistance Polyethylene-based Pipes with Highly Biaxially Oriented Structure and Self-reinforcing Mechanism
- Chinese Journal of Polymer Science Vol. 41, Issue 6, Pages: 942-955(2023)
- Affiliations：
  
  a.State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
  b.Synthetic Resin Laboratory, Petrochemical Research Institute, PetroChina, Beijing 102206, China
  c.School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
- Author bio：
  
  yelinwh@126.com
- Funds：
- DOI：10.1007/s10118-022-2879-x
  CLC：
- Received：01 July 2022，
  
  Revised：2022-9-4，
  
  Accepted：27 September 2022，
  
  Online First：12 December 2022，
  
  Published：01 June 2023
- Accepted：
Scan QR Code
Wu, B. Y.; Cai, Y. D.; Zhao, X. W.; Ye, L. Construction of pressure-resistance polyethylene-based pipes with highly biaxially oriented structure and self-reinforcing mechanism. Chinese J. Polym. Sci. 2023, 41, 942–955

Bu-Yong Wu, Yu-Dong Cai, Xiao-Wen Zhao, et al. Construction of Pressure-resistance Polyethylene-based Pipes with Highly Biaxially Oriented Structure and Self-reinforcing Mechanism[J]. Chinese Journal of Polymer Science, 2023, 41(6): 942-955.
Wu, B. Y.; Cai, Y. D.; Zhao, X. W.; Ye, L. Construction of pressure-resistance polyethylene-based pipes with highly biaxially oriented structure and self-reinforcing mechanism. Chinese J. Polym. Sci. 2023, 41, 942–955 DOI： 10.1007/s10118-022-2879-x.

Bu-Yong Wu, Yu-Dong Cai, Xiao-Wen Zhao, et al. Construction of Pressure-resistance Polyethylene-based Pipes with Highly Biaxially Oriented Structure and Self-reinforcing Mechanism[J]. Chinese Journal of Polymer Science, 2023, 41(6): 942-955. DOI： 10.1007/s10118-022-2879-x.

摘要

Biaxially oriented PE/UHMWPE pipes were fabricated. During die drawing

long UHMWPE chains were sufficiently stretched

acting as shish structure and inducing short PE chains to form kebab crystals. The lamellae remarkably deviated from hoop to axial direction

presenting dense biaxial orientation structure

causing significantly enhanced hoop strength and burst pressure.

Abstract

Fabrication of polyethylene (PE) pipe with significantly enhanced hoop strength and burst pressure is essential necessary for high transportation requirements. In this work

biaxially oriented PE/ultrahigh molecular weight polyethylene (PE/UHMWPE) blend pipes were fabricated on self-made pipe solid-phase die drawing apparatus. Due to formation of chain entanglement network and enhanced viscoelasticity

incorporation of UHMWPE chains improved stretchability and biaxial orientation degree of blend pipe. During die drawing

formation of more miscible blend system make long UHMWPE chains be sufficiently stretched under load

and such extended-chain conformation of UHMWPE acted as shish structure and induced short PE chains to array orderly and form kebab crystals. With increasing axial draw ratio

the lamellae remarkably deviated from hoop to axial direction

while the blend pipe exhibited higher crystallinity and orientation degree than that of PE pipe

presenting a more uniform and dense biaxial orientation structure with shish-kebab crystals. As a result

the blend pipe showed roughly 99% increase in tensile strength along hoop direction and 25% increase in burst pressure

respectively. Such biaxial self-reinforced PE/UHMWPE blend pipes exhibit promising application prospect as high-pressure transportation pipelines in civil engineering.

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