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Journal of Intelligent Material Systems and Structures
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Durability Assessment of Styrene- and Epoxy-based Shape-memory Polymer Resins

G.P. Tandon

Air Force Research Laboratory, Materials and Manufacturing Directorate AFRL/RXBC, Wright-Patterson AFB, OH, Gyaneshwar.Tandon{at}wpafb.af.mil

K. Goecke

Air Force Research Laboratory, Materials and Manufacturing Directorate AFRL/RXBC, Wright-Patterson AFB, OH

K. Cable

Cornerstone Research Group, Inc., Dayton, OH

J. Baur

Air Force Research Laboratory, Materials and Manufacturing Directorate AFRL/RXBC, Wright-Patterson AFB, OH

The present study is a baseline assessment of the durability of styrene- and epoxy-based shape memory polymer resin materials being considered for morphing applications when exposed to service environment. The approach for the experimental evaluation is a measurement of the shape memory properties and elastomeric response before and after separate environmental exposure to (i) water at 49°C for 4 days, (ii) in lube oil at room temperature and at 49°C for 24 h, and (iii) after exposure to xenon arc (63°C, 18 min water and light/102 min light only) and spectral intensity of 0.3—0.4 watts/m2 for 125 cycles (250 h exposure time). Parameters being investigated include modulus in the rubbery and glassy state, stored strain, shape fixity, stress recovery ratio, and linear shape recovery. In addition, we monitor changes in specimen color, weight, and dimensions along with onset of damage due to conditioning and subsequent thermomechanical cycling.

Key Words: shape memory • styrene • epoxy • tension • fixity • recovery • conditioning.

This version was published on November 1, 2009

Journal of Intelligent Material Systems and Structures, Vol. 20, No. 17, 2127-2143 (2009)
DOI: 10.1177/1045389X09348255
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