Fig. 2: Origin of E-CE entropy change and its influencing factors.
From: Solid-state cooling by elastocaloric polymer with uniform chain-lengths
a TEM images of TPEs-1 at a strain of 0%. PS domains (black regions) were stained dark by RuO4, and the light regions correspond to PE/PB domains. b 2D WAXD diffractograms of TPEs-1 at different strain levels. c Heat capacity cp and cp/T versus temperature during the heating process of TPEs-1. The green shadow represents the integral region of cp/T from T4 to Ta. d Schematic diagram of PE/PB conformational evolution in the stretching process of TPEs with different MRs. The red fibers, blue fibers and orange cylinders represent straight PE/PB segments, curled PE/PB segments and PS segments, respectively. e GPC curves of TPEs with different MRs. f |ΔTadi| versus MR of TPEs within the ultimate strains (former one before fracture strain) during the cooling process.
