Enabling large actuated strain at low electric field by grafting cyanoester dipoles onto a poly(styrene-b-butadiene-b-styrene) elastomer using thiol-ene click chemistry

A dielectric elastomer can undergo a large deformation when it is subjected to an applied electric field. As result, finds potential usage in artificial muscles, soft robotics, and medical devices. However, current elastomers suffer from low constants (e.g., <4.5). Grafting highly dipolar groups onto has been proved be efficient method improve the constant thus electroactuation property. grafting side chain bearing two or more polymer main not explored past. In this work, we grafted cyanoester poly (styrene- b -butadiene- -styrene) (SBS) its actuation performance using thiol-ene click reaction. series of new with different densities were obtained excellent properties: up 11.6 at 10 5 Hz strain 9% field 13.9 MV/m. This work provides us effective strategy elastomers. • Modified SBS-CN synthesized by “Click” Dipoles cyano ester are per SBS elastomer. SBS-CN-78.4%