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19 April 2013 Investigation of annealed ionic polymer transducers in sensing
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Ionic polymer transducers (IPTs) are fabricated from ionomers sandwiched between conductive electrodes. IPTs act as actuators by deforming in response to an input voltage. They also exhibit sensing behavior yielding a current when exposed to various forms of deformation. IPT performance depends on many variables including the stiffness of the polymer which evolves with the level of semicrystallinity within the polymer. The purpose of this study is to investigate the strength of the streaming potential model for IPTs created with polymers having various semicrystallinity percentages. Specifically in this case, annealing effects, which influence the semicrystallinity and stiffness of the polymer, on IPT sensing were explored in bending. The implications of streaming potential theory on current generation presented here will be evaluated via experiments that will be discussed in a later publication. The model proposed here is different than previous reports on the streaming potential theory because incorporation of two very important variables has not been considered before: semicrystallinity and time. It is shown that the semicrystallinity especially is a key factor.
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Ursula T. Zangrilli, Bilge Kocer, and Lisa M. Weiland "Investigation of annealed ionic polymer transducers in sensing", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86923W (19 April 2013);

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