Table 2 Ballistic impact test results for the polyimide aerogel blocks.
Name | Areal density, ρa (g cm−2) | Impact velocity, vi (m −1) | Exit velocity, ve (m s−1) | Absorbed energy, (%) |
|---|---|---|---|---|
PI-1 | 0.22 | 1283.05 | 1160.18 | 18.24 |
PI-2 | 0.19 | 1091.16 | 1018.95 | 12.80 |
PI-3 | 0.23 | 1237.40 | 1145.32 | 14.33 |
PI-4 | 0.20 | 466.24 | 369.21 | 37.29 |
PI-5 | 0.19 | 435.22 | 371.63 | 27.09 |
PI-6-A | 0.19 | 160.92 | 0 | 100 |
PI-6-B | 0.19 | 174.09 | 0 | 100 |
PI-7 | 0.17 | 179.21 | 31.61 | 96.89 |
PI-8 | 0.23 | 171.53 | 0 | 100 |
PI-9 | 0.18 | 921.65 | 874.03 | 10.07 |
PI-10 | 0.19 | 660.51 | 577.28 | 23.61 |
PI-11 | 0.22 | 875.57 | 819.38 | 12.42 |
PI-12 | 0.23 | 675.88 | 584.39 | 25.24 |
