Properties of composites with different HEA contents.
| Series | Content of HEA/% | Adhesion/degree | Pencil hardness |
|---|---|---|---|
| 1# | 0 | 3 | 3H |
| 2# | 10 | 2 | 3H |
| 3# | 20 | 1 | 2H |
| 4# | 30 | 1 | H |
| 5# | 40 | 1 | HB |
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