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
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- Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content
- 高分子科学（英文版） 2022年40卷第12期页码：1697-1705
- 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：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51773040 and 52173056).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-022-2789-y.
- DOI：10.1007/s10118-022-2789-y
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Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content[J]. 高分子科学（英文版）, 2022,40(12):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.
Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content[J]. 高分子科学（英文版）, 2022,40(12):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 (,R,f,s) of samples increased with the paraffin content, and interestingly, a significant improvement in ,R,f, 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 ,R,f,. 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

Reversible plasticity shape memory effectPoly(styrene-b-(ethylene-co-butylene)-b-styrene) Crystallizable paraffinParaffin content

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