Fig. 2 Thermomechanical characterization of the elasticity and plasticity. Thermomechanical characterization of the elasticity and plasticity. (A) Stress relaxation at various temperatures. (B) Partial stress relaxation and the corresponding shape retention at 130°C. (C) Quantitative correlation between the shape retention ratio and the extent of stress relaxation. (D) Consecutive plasticity (stress relaxation) cycles at 130°C. (E) Consecutive elasticity (shape memory) cycles. (F) Consecutive elasticity and plasticity cycles (labeled “I” and “II,” respectively, for easy demonstration). Qian Zhao et al. Sci Adv 2016;2:e1501297 Copyright © 2016, The Authors