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An elastomer with ultrahigh strain-induced crystallization.
- Source :
-
Science Advances . 12/15/2023, Vol. 9 Issue 50, p1-10. 10p. - Publication Year :
- 2023
-
Abstract
- Strain-induced crystallization (SIC) prevalently strengthens, toughens, and enables an elastocaloric effect in elastomers. However, the crystallinity induced by mechanical stretching in common elastomers (e.g., natural rubber) is typically below 20%, and the stretchability plateaus due to trapped entanglements. We report a class of elastomers formed by end-linking and then deswelling star polymers with low defects and no trapped entanglements, which achieve strain-induced crystallinity of up to 50%. The deswollen end-linked star elastomer (DELSE) reaches an ultrahigh stretchability of 12.4 to 33.3, scaling beyond the saturated limit of common elastomers. The DELSE also exhibits a high fracture energy of 4.2 to 4.5 kJ m-2 while maintaining low hysteresis. The heightened SIC and stretchability synergistically promote a high elastocaloric effect with an adiabatic temperature change of 9.3°C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23752548
- Volume :
- 9
- Issue :
- 50
- Database :
- Academic Search Index
- Journal :
- Science Advances
- Publication Type :
- Academic Journal
- Accession number :
- 174228289
- Full Text :
- https://doi.org/10.1126/sciadv.adj0411