Table 2 Physical properties of cross-linked poly(urethane-urea)s with different HUBs.
From: Dynamic urea bond for the design of reversible and self-healing polymers
T g (°C) | Young’s modulus (MPa) | Before cutting | After cutting and healing | Breaking strain recovery (%) | |||
|---|---|---|---|---|---|---|---|
Breaking stress (MPa) | Breaking strain (%) | Breaking stress (MPa) | Breaking strain (%) | ||||
6a | −49 | 0.87±0.04 | 0.69±0.05 | 426±20 | / | / | / |
6c | −52 | 1.22±0.12 | 0.93±0.06 | 301±12 | 0.71±0.05 | 268±13 | 87±4 |
6e | −78 | 0.87±0.20 | 0.62±0.02 | 243±21 | 0.32±0.08 | 68±4 | 29±2 |
