. 2020 Dec 25;13(1):56. doi: 10.3390/polym13010056

Table 3.

Triple-shape-memory properties of shape-memory polyurethanes (SMPU) containing coumarin moieties.

Sample	Photocross-Linking Conditions		R_f_{(0 to 1)} (%) ^a	R_f_{(1 to 0)} (%) ^b	∆Ɛ_rel _{(1 to 2)} (%) ^c	ΔƐ_rel _{(2 to 0)} (%) ^d
Sample	Time (min)	Light Intensity (mW/cm²)	R_f_{(0 to 1)} (%) ^a	R_f_{(1 to 0)} (%) ^b	∆Ɛ_rel _{(1 to 2)} (%) ^c	ΔƐ_rel _{(2 to 0)} (%) ^d
SMPU	5	34.0	99	90.1	85.1	14.9
SMPU	10	34.0	99	92.1	79.1	20.9
SMPU	15	34.0	99	91	77.6	22.4

^a Fixed ratio of temporary shape 1. ^b Recovery ratio from shape 1 to original shape. ^c Ratio of thermal-responsive recovery step. ^d Ratio of photoresponsive recovery step.