Table 3. Flammability Test Results of Flame-Retardant Epoxy Thermosets.
| UL-94 burning test |
||||
|---|---|---|---|---|
| samples | LOI (%) | t1 + t2 (s) | dropping | rate |
| pure EP | 26.0 | >180 | yes | no rate |
| EP/3-DCSA-Cu | 33.3 | 28 | no | V-1 |
| EP/5-DCSA-Cu | 36.0 | 8 | no | V-0 |
| EP/7-DCSA-Cu | 32.2 | 25 | no | V-1 |
| EP/5-DCSA-Na | 29.5 | 32 | no | V-1 |