Abstract
The high flammability of epoxy resin (EP) greatly limits its application in industrial production. To enhance the fire resistance of EP, a phosphorus-containing melamine cyanurate derivative (P-MCA) flame retardant was synthesized by modifying melamine cyanurate (MCA) with phenylphosphonic dichloride (PPDCl). The structure and properties of P-MCA were comprehensively characterized. The EP composite with 5 wt% of P-MCA (EP/5 P-MCA) exhibited a limiting oxygen index of 29.2% and achieved a V-0 level in UL-94. Compared with EP, the peak heat release rate and peak smoke production rate of EP/5 P-MCA were reduced by 18.8% and 24.2%, respectively. The improved fire resistance of EP/5 P-MCA was attributed to the physical shielding of the carbon layer and the dilution effect of nitrogen-containing gases. Besides, the flexural strength of EP/5 P-MCA was 14.7% higher than that of EP due to the desirable compatibility of P-MCA and EP. Meanwhile, the glass transition temperature (Tg) of EP and the crosslinking density of the rubbery state increased to a certain extent with the addition of P-MCA. In conclusion, P-MCA can simultaneously improve the fire resistance and mechanical properties of EP, indicating great potential for application.
| Original language | English |
|---|---|
| Article number | 129789 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 652 |
| DOIs | |
| State | Published - 5 Nov 2022 |
Keywords
- Epoxy resin
- Flame retardant
- MCA derivative
- Mechanical properties
- Phosphorus