The functional polymers and structures can be actuated by the external stimulation, including the light, temperature, and electric field. Nowadays, various smart polymers are studied as soft sensors and actuators or are designed to compose the smart structures to their own required performances. The typical soft smart polymers involve dielectric elastomers, ionic-polymer metal composites, hydrogel, and shape memory polymers. During recent years, research on the stimuli-responsive polymers and structures has been extensively performed, especially the electroresponsive soft materials. This special issue aims to create a multidisciplinary forum of discussion on the most recent research advances in synthesis, characterization, design, and application of soft smart polymer and structures, providing a potential guided outlook for future studies.

We are pleased to launch this special issue and invite researchers to submit their original research papers. Both the theoretical and experimental results are welcome. Reviews within the domain of this special issue are also considered.

Potential topics include but are not limited to the following:

• Synthesis of functional and smart polymers
• Characterization and modeling of soft materials
• Design of smart structures
• Applications of polymers as sensors and actuators
• Biomedical applications of smart polymers
• 3D-printed smart polymers and applications
• Energy harvesting systems that utilize smart polymers