A Mechanical Robust, Self-Healable, Recyclable Elastomer for Damping Over A Broad Temperature Range

Polymers are able to suppress vibrations and noises in fields due to the high internal friction of molecular chains. Therefore, polymers are naturally fit to be damping material. However, currently available damping elastomers are not able to include robust mechanical properties and the temperature range for effective damping is not long enough. Here, the ion-dipole interactions which are able to adjust the relaxation behavior of supermolecular polymer network, are important for stable and enhance the network. Through introducing the ion-dipole interactions, the resulted elastomer shows excellent mechanical properties (fracture stress ~ 1.01 MPa, tensile strength ~ 2900%, toughness ~ 15.13 MJ m-3). Also, the elastomer demonstrate extraordinary damping properties. The damping capacity reaches 73.9% and the peak value of damping factor is 2.29. Because of the ion-dipole interactions which driven by entropy, make sure the elastomer is stable in a wide range of temperature (0-160 °C， tan δ＞0.3), which is difficult by traditional means. Furthermore, the elastomer is able to self-heal and the healing efficiency is about 95% in 2 hours. Moreover, this unique design concept will provide a general approach to developing advanced damping materials.