A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer

Bing Wang; Yuan-Chu Gao; Hai Wang; Hui Niu

doi:10.1007/s10118-024-3176-7

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A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer

RESEARCH ARTICLE | Updated：2024-09-23

- A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer
- Chinese Journal of Polymer Science Vol. 42, Issue 10, Pages: 1557-1565(2024)
- Affiliations：
  
  State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
- Author bio：
  
  haiwang@dlut.edu.cn (H.W.)
  hniu@dlut.edu.cn (H.N.)
- Funds：
- DOI：10.1007/s10118-024-3176-7
  CLC：
- Received：06 May 2024，
  
  Revised：2024-05-23，
  
  Accepted：24 May 2024，
  
  Online First：21 August 2024，
  
  Published：01 October 2024
- Accepted：
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Wang, B.; Gao, Y. C.; Wang, H.; Niu, H. A study on the impact of chemical structure on the evolution of aggregate structure in fiber-shaped high density polyethylene vitrimer. Chinese J. Polym. Sci. 2024, 42, 1557–1565

Bing Wang, Yuan-Chu Gao, Hai Wang, et al. A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer[J]. Chinese Journal of Polymer Science, 2024, 42(10): 1557-1565.
Wang, B.; Gao, Y. C.; Wang, H.; Niu, H. A study on the impact of chemical structure on the evolution of aggregate structure in fiber-shaped high density polyethylene vitrimer. Chinese J. Polym. Sci. 2024, 42, 1557–1565 DOI： 10.1007/s10118-024-3176-7.

Bing Wang, Yuan-Chu Gao, Hai Wang, et al. A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer[J]. Chinese Journal of Polymer Science, 2024, 42(10): 1557-1565. DOI： 10.1007/s10118-024-3176-7.

摘要

Fiber-shaped polymer vitrimer was challenged in this work using commercial maleic anhydride-grafted-high density polyethylene as the matrix and hexanediol as the crosslinker for facile preparation of HDPE vitrimers. The impact of dynamic covalent bonds on the formation of aggregate structures during fiber-shaped vitrimers processing was revealed.

Abstract

Vitrimers have emerged as a prominent research area in the field of polymer materials. Most of the studies have focused on synthesizing polymers with versatile dynamic crosslinking structures

while the impact of chemical structure on aggregate structure of vitrimers

particularly during polymer processing

remains insufficiently investigated. The present study employed commercial maleic anhydride-grafted-high density polyethylene (M-

-HDPE) as the matrix and hexanediol as the crosslinker to facilely obtain fiber-shaped HDPE vitrimers through a reaction extrusion and post-drawing process. Through chemical structure characterization

morphology observation

thermal and mechanical properties investigation

as well as aggregate structure analysis

this work revealed the influence of dynamic bonds on the formation of aggregate structures during fiber-shaped vitrime

rs processing. A small amount of dynamic bonds in HDPE restricts the motion of PE chain during melt-extruding and post-drawing

resulting in a lower orientation of the PE chains. However

lamellar growth and fibril formation during post-drawing at high temperature are enhanced to some extent due to the competition between dynamic bond and chain relaxation. The uneven morphology of fiber-shaped HDPE vitrimers can be attributed to the stronger elastic effect brought by dynamic bonding

which plays a more dominant role in determining the mechanical properties of fiber-shaped vitrimers compared to aggregate structure.

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references

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