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Shape‐Memory Natural Rubber: An Exceptional Material for Strain and Energy Storage
Author(s) -
Heuwers Benjamin,
Beckel Anna,
Krieger Andreas,
Katzenberg Frank,
Tiller Joerg C.
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200649
Subject(s) - natural rubber , shape memory alloy , shape memory polymer , materials science , dynamic mechanical analysis , composite material , polymer , modulus , strain (injury) , energy storage , thermal , thermal energy storage , strain energy , smart material , polymer chemistry , structural engineering , thermodynamics , physics , engineering , medicine , power (physics) , finite element method
Shape‐memory polymers (SMPs) are smart, responsive materials with numerous potential applications. Based on previously introduced shape‐memory natural rubber (SMNR), which shows exceptional properties such as strain storage of 1000%, cold storage, cold programmability, and mechanical and thermal triggers tunable both during and after programming, different SMNRs regarding their shape‐memory parameters are investigated. Furthermore, their energy‐storage capability and their mechanical properties are explored. SMNRs show fixity ratios of up to 94% and excellent recovery ratios of up to 100% whereas strains even above 1000% can be stored. Energies of up to 4.88 J g −1 can be stored with efficiencies of up to 53.30%. Further, the Young's modulus of SMNR can be switched by two orders of magnitude upon triggering or programming.