Preparation of High Performance Polyethylene Microtubes via Rotation Extrusion Processing

Yi-jun LI; Lin PI; Min NIE; Qi WANG

doi:10.14028/j.cnki.1003-3726.2019.01.004

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Preparation of High Performance Polyethylene Microtubes via Rotation Extrusion Processing

The 30th Anniversary Issue I | 更新时间：2022-09-02

- Preparation of High Performance Polyethylene Microtubes via Rotation Extrusion Processing
- Polymer Bulletin Vol. 32, Issue 1, Pages: 31-38(2019)
- 作者机构：
  
  高分子材料工程国家重点实验室（四川大学），四川大学高分子研究所，成都 610065
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2019.01.004
  CLC：
- Published：20 January 2019，
  
  Received：26 September 2018，
  
  Revised：05 November 2018，
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Yi-jun LI, Lin PI, Min NIE, Qi WANG. Preparation of High Performance Polyethylene Microtubes via Rotation Extrusion Processing. [J]. Polymer Bulletin 32(1):31-38(2019)
DOI：

Yi-jun LI, Lin PI, Min NIE, Qi WANG. Preparation of High Performance Polyethylene Microtubes via Rotation Extrusion Processing. [J]. Polymer Bulletin 32(1):31-38(2019) DOI： 10.14028/j.cnki.1003-3726.2019.01.004.

摘要

本文利用自行研制的旋转挤出流变仪，采用芯棒旋转模式成功制备了高抗扭结性聚乙烯（PE）医用微管。结果表明，在微管挤出过程中施加额外环向剪切力，可促进PE分子链伸直形成偏离轴向的串晶。当微管受到扭转作用时，高强高模串晶在纯剪切应力方向取向度高，大幅提高了PE微管的环向扭转性能。与传统挤出聚乙烯微管相比，微型旋转挤出PE微管的环向剪切模量最高可达1018.1 MPa，提高89.3%。

Abstract

In this paper

polyethylene (PE) microtubes with high torsion resistance were firstly fabricated by our self-designed rotation rheometer with mandrel rotation modes. The results demonstrated that with the introduction of hoop stress during rotation extrusion

molecular chains are starched in the off-axial direction and formed shish-kebabs with deviated angles. The deviated shish-kebabs exhibited high orientation degree in the pure shear stress direction

which gave rise to enhanced torsion resistance of PE microtubes. Compared with conventional PE microtubes

a maximum shear modulus of 1018. 11 MPa was achieved

increased by 89.3%.

关键词

旋转挤出聚乙烯管聚合物微管形态取向

Keywords

Rotation extrusionPolyethylene tubesMicrotubesMorphologyOrientation

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