This talk will present work on the fabrication of shape memory polymers (SMPs) by swelling a commercial rubber band with molten stearic acid. By this method a SMPs with shape fixity of 100% and recovery of 99% can be obtained during free recovery after uniaxial deformation to 100% strain.  Experiments to measure the shape memory properties under both stress and strain controlled conditions will be reported and compared. This fabrication method offers a number of advantages for preparing SMPs. First, it utilizes natural rubber as the base material for the SMP, which capitalizes on a high performance, commodity elastomer. Second, by blending a commercial polymer with a small molecule additive no additional chemistry is needed for the preparation of the SMP. Third, this route inverts the typically processing steps by crosslinking the permanent network prior to formation of the physically crosslinked reversible network. This offers a means to potentially generate a SMP from any preformed elastomeric article.

Shape memory rubber bands

248th National Meeting (2014)

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