Structural Evolution of Ultra-High Molecular Weight Polyethylene Low-Entangled Films with Reserved Shish Crystals During Hot Stretching

Jia-Wei Gao; Li Chen; Ye-Shun Zhong; Chao-Wei Xing; Yi-Guo Li; Zong-Bao Wang

doi:10.1007/s10118-024-3143-3

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Structural Evolution of Ultra-High Molecular Weight Polyethylene Low-Entangled Films with Reserved Shish Crystals During Hot Stretching

RESEARCH ARTICLE | Updated：2024-08-06

- Structural Evolution of Ultra-High Molecular Weight Polyethylene Low-Entangled Films with Reserved Shish Crystals During Hot Stretching
- Chinese Journal of Polymer Science Vol. 42, Issue 8, Pages: 1227-1242(2024)
- Affiliations：
  
  School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
- Author bio：
  
  wangzongbao@nbu.edu.cn
- Funds：
- DOI：10.1007/s10118-024-3143-3
  CLC：
- Received：27 February 2024，
  
  Revised：2024-04-08，
  
  Accepted：12 April 2024，
  
  Online First：10 May 2024，
  
  Published：01 August 2024
- Accepted：
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Gao, J. W.; Chen, L.; Zhong, Y. S.; Xing, C. W.; Li, Y. G.; Wang, Z. B. Structural evolution of ultra-high molecular weight polyethylene low-entangled films with reserved shish crystals during hot stretching. Chinese J. Polym. Sci. 2024, 42, 1227–1242

Jia-Wei Gao, Li Chen, Ye-Shun Zhong, et al. Structural Evolution of Ultra-High Molecular Weight Polyethylene Low-Entangled Films with Reserved Shish Crystals During Hot Stretching[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1227-1242.
Gao, J. W.; Chen, L.; Zhong, Y. S.; Xing, C. W.; Li, Y. G.; Wang, Z. B. Structural evolution of ultra-high molecular weight polyethylene low-entangled films with reserved shish crystals during hot stretching. Chinese J. Polym. Sci. 2024, 42, 1227–1242 DOI： 10.1007/s10118-024-3143-3.

Jia-Wei Gao, Li Chen, Ye-Shun Zhong, et al. Structural Evolution of Ultra-High Molecular Weight Polyethylene Low-Entangled Films with Reserved Shish Crystals During Hot Stretching[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1227-1242. DOI： 10.1007/s10118-024-3143-3.

摘要

The reserved shish crystals can induce the formation and structural evolution of shish-kebab crystals for UHMWPE low-entangled films during the hot stretching. High-temperature stretching is more favorable for structural evolution of UHMWPE films with reserved shish crystals compared to low-temperature stretching.

Abstract

Shish crystals are crucial to achieving high performance low-dimensional ultra-high molecular weight polyethylene (UHMWPE) products. Typically

high stretch and shear flow fields are necessary for the formation of shish crystals. In this study

UHMWPE gel films with reserved shish crystals were prepared by gel molding

the structural evolution and properties of UHMWPE films stretched at temperatures of 100

110

120 and 130 °C were investigated by

in situ

small-angle X-ray

scattering (SAXS)/ultra-small-angle X-ray scattering (USAXS)/wide-angle X-ray diffraction (WAXD) measurements as well as scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) measurements. Our findings showed that the reserved shish crystals can facilitate the formation and structural evolution of shish-kebab crystals during the hot stretching. Additionally

the reserved shish crystals promote the structural evolution of UHMWPE films to a greater extent when stretched at 120 and 130 °C

compared to 100 and 110 °C

resulting in higher crystallinity

orientation

thermal properties

breaking strength and Young's modulus. Compared to UHMWPE high-entangled films with reserved shish crystals prepared by compression molding

UHMWPE low-entangled films with reserved shish crystals prepared by gel molding are more effective in inducing the formation and evolution of shish-kebab crystals during the hot stretching

resulting in increased breaking strength and Young's modulus.

关键词

Keywords

references

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