Development of Shockwave-Absorbing Materials Using Polyrotaxane
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Shockwaves generated by high-energy explosions are acoustic stress waves with high pressure and strain rates that can cause severe brain damage. The shockwave dissipation abilities of current shock-absorbing polymers are insufficient, primarily due to limitations in segmental polymer motions. Our approach to attenuation leverages the ring-sliding dynamics of polyrotaxane (PR), which converts mechanical energy into molecular motion. To demonstrate this, we prepared PR using a poly(ethylene glycol) backbone with α-cyclodextrin rings. We investigated the effects of PR concentration and ring density on the shock dissipation, where a laser-induced shockwave setup is used to quantitatively measure the energy dissipation.