Journal
ACS MACRO LETTERS
Volume 3, Issue 4, Pages 374-377Publisher
AMER CHEMICAL SOC
DOI: 10.1021/mz500131r
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Funding
- National Science Foundation [DMR 1309853, CHE-1012237]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1309853] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1012237] Funding Source: National Science Foundation
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A facile method was developed for fabrication of a robust shape memory polymer by swelling cross-linked natural rubber with stearic acid. Commercial rubber bands were swollen in molten stearic acid at 75 degrees C (35 wt % stearic acid loading). When cooled the crystallization of the stearic acid formed a percolated network of crystalline platelets. The microscopic crystals and the cross-linked rubber produce a temporary network and a permanent network, respectively. These two networks allow thermal shape memory cycling with deformation and recovery above the melting point of stearic acid and fixation below that point. Under manual, strain-controlled, tensile deformation the shape memory rubber bands exhibited fixity and recovery of 100% +/- 10%.
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