Table 4.
UL-94 vertical classification of unmodified (control) and deacetylated mycelium and mycelium-containing epoxy composites.
| Sample | t1 (s) | (t1 + t2) (s)a | (t2 + t3) (s)b | Combustion up to clampc | Dripping specimensd | UL-94 V-rating |
|---|---|---|---|---|---|---|
| Control | 13 | 150 | 57 | No | No | V-1 |
| 2 M/40 °C/8 h | 1 | 14 | 9 | No | No | V-0 |
| Epoxy/control | N/A | N/A | N/A | Yes | No | No rating |
| Epoxy/2 M/40 °C/8 h | N/A | N/A | N/A | Yes | No | No rating |
| Epoxy | N/A | N/A | N/A | Yes | Yes | No rating |
t1 is after-flame time after the first flame application in second; t2 is after-flame time after the second flame application in second; t3 is afterglow times after the second flame application in second.
a(t1 + t2) is the total summation of after-flame time for any condition set of five specimens.
b(t2 + t3) presents the average of after-flame plus afterglow time for each individual specimen after second flame application in second.
cCombustion up to holding clamp indicates that the specimen was completely burned.
dDripping of burning specimens which ignites the underneath cotton batting.