Rubber bands are actually kind of complicated materials, they have more than one elastic regime before you have any plastic deformation. Maybe that’s what they

Rubber bands are actually kind of complicated materials, they have more than one elastic regime before you have any plastic deformation. Maybe that’s what they are referring to. It’s not a perfect analogy, but applied strain changes a property in each case (elastic modulus for the rubber, conductivity for TFA) https://www.eng.uc.edu/~beaucag/Classes/Characterization/Herve%20Marand%20Rubber%20Elasticity%20Lecture17.pdf https://www.eng.uc.edu/~beaucag/Classes/Characterization/Her...