Table 2. Lap-Shear Strength and Adhesion Failure Temperatures of the Enhanced PHU Hot-Melt Adhesives on Stainless Steel.
| Lap-shear
strength |
|||||
|---|---|---|---|---|---|
| Code | Gel content (%)a | Original | Rebonding | Rebonding 2 | SAFT (°C) |
| 50/50-MXDA | b | 7.0 ± 0.8 | 7.8 ± 0.8 | 8.5 ± 0.6 | 59 ± 1 |
| 50/50-MXDA+15 wt %DER | 3.8 ± 2.8 | 3.1 ± 0.8 | 5.5 ± 1.1 | 8.9 ± 2.0 | 104 ± 4 |
| 50/50-PXDA | b | 3.6 ± 1.0 | 6.2 ± 1.3 | 4.2 ± 0.9 | 63 ± 1 |
| 50/50-PXDA+15 wt %DER | 41.3 ± 7.9 | 2.4 ± 0.8 | 3.1 ± 0.8 | 6.7 ± 2.3 | 119 ± 12 |
a
Gel content after Soxhlet extraction in THF for 24 h.
b
Samples dissolved totally in THF.