TY - GEN
T1 - Shape memory effects of environmentally conditioned shape memory polymers studied by nanoindentation
AU - Fulcher, J. T.
AU - Lu, Y. C.
AU - Tandon, G. P.
AU - Foster, D. C.
PY - 2010
Y1 - 2010
N2 - Shape memory polymers (SMPs) have been candidate materials for morphing applications. However, the SMPs have not been fully tested to work in relevant environments required for Air Force missions. In this study, an epoxy-based SMP was separately exposed to moisture, lubricating oil and UV radiation which are simulated service environments designed to be reflective of anticipated performance requirements. The thermomechanical properties and shape memory effects were studied by using novel high-temperature nanoindentation technique. Results show that environmental conditions have affected the glass transition temperature and mechanical properties of the SMPs. In most cases, the conditioned SMPs exhibited higher elastic moduli than the unconditioned SMP. The shape recovery ability of the SMP was assessed by creating an indent and then observing the corresponding recovery according to the standard shape memory cycle. It was found that the deformation was mostly recovered for both conditioned and unconditioned SMP samples on heating the material above its glass transition temperature.
AB - Shape memory polymers (SMPs) have been candidate materials for morphing applications. However, the SMPs have not been fully tested to work in relevant environments required for Air Force missions. In this study, an epoxy-based SMP was separately exposed to moisture, lubricating oil and UV radiation which are simulated service environments designed to be reflective of anticipated performance requirements. The thermomechanical properties and shape memory effects were studied by using novel high-temperature nanoindentation technique. Results show that environmental conditions have affected the glass transition temperature and mechanical properties of the SMPs. In most cases, the conditioned SMPs exhibited higher elastic moduli than the unconditioned SMP. The shape recovery ability of the SMP was assessed by creating an indent and then observing the corresponding recovery according to the standard shape memory cycle. It was found that the deformation was mostly recovered for both conditioned and unconditioned SMP samples on heating the material above its glass transition temperature.
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M3 - Conference contribution
AN - SCOPUS:78649485049
SN - 9781934551073
T3 - International SAMPE Symposium and Exhibition (Proceedings)
BT - SAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy"
T2 - SAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy"
Y2 - 17 May 2010 through 20 May 2010
ER -