Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content

Shao-Quan Zhao; Jia-Chun Feng

doi:10.1007/s10118-022-2789-y

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Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content

RESEARCH ARTICLE | Updated：2022-11-16

- Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content
- Chinese Journal of Polymer Science Vol. 40, Issue 12, Pages: 1697-1705(2022)
- Affiliations：
  
  a.State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
  b.Yiwu Research Institute of Fudan University, Yiwu 322000, China
- Author bio：
  
  jcfeng@fudan.edu.cn
- Funds：
- DOI：10.1007/s10118-022-2789-y
  CLC：
- Received：04 April 2022，
  
  Revised：2022-5-2，
  
  Accepted：05 May 2022，
  
  Online First：12 August 2022，
  
  Published：01 December 2022
- Accepted：
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Zhao, S. Q.; Feng, J. C. Reversible plasticity shape memory effect in SEBS/crystallizable paraffin: influence of paraffin content. Chinese J. Polym. Sci. 2022, 40, 1697–1705

Shao-Quan Zhao, Jia-Chun Feng. Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content[J]. Chinese Journal of Polymer Science, 2022, 40(12): 1697-1705.
Zhao, S. Q.; Feng, J. C. Reversible plasticity shape memory effect in SEBS/crystallizable paraffin: influence of paraffin content. Chinese J. Polym. Sci. 2022, 40, 1697–1705 DOI： 10.1007/s10118-022-2789-y.

Shao-Quan Zhao, Jia-Chun Feng. Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content[J]. Chinese Journal of Polymer Science, 2022, 40(12): 1697-1705. DOI： 10.1007/s10118-022-2789-y.

摘要

The relationship between reversible plasticity shape memory performance of SEBS/crystallizable paraffin and its microstructure was systematically established.

Abstract

Polymers with reversible plasticity shape memory effect (RPSME) have attracted considerable attention due to their simple programming and large deformation. However

the exact mechanisms of RPSME are still not thoroughly understood. In this work

the RPSME of SEBS/crystallizable paraffin was investigated by comparatively analyzing the performances and microstructures of samples with different paraffin content. It was found the shape fixing ratios (

s) of samples increased with the paraffin content

and interestingly

a significant improvement in

was observed when the paraffin content exceeded 60 wt%. Tensile test results showed that the deformation characteristics of samples changed from elastic to plastic as the paraffin content increased above 60 wt%. By exploring the crystallization behaviors of paraffin in various SEBS/paraffin samples

it was revealed that the microstructures of SEBS/paraffin were different when the paraffin content was below 50 wt% and above 60 wt%. In samples with low paraffin content (below 50 wt%)

nearly all paraffin was co-crystallized with ethylene-co-butylene (EB) chains and its crystallization was severely restricted; while in samples with high paraffin content (above 60 wt%)

“excess” paraffin appeared and this part of paraffin crystallized on the template of the EB/paraffin co-crystals

which might be responsible for the elastic-to-plastic transition and the sharp increase in

. Based on the above results

a possible structural model was proposed to explain the exact mechanism of RPSME in SEBS/paraffin.

关键词

Keywords

references

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