Additionally, when the molecular weight was about 68000, a carbonized layer with well-distributed inner bubbles and high overall-was fanned. and the fire-retardant properties were also good.

• 选用相对分子质量6.；8万左右的基料树脂能得到泡孔分布均匀、整体强度较好的炭化层结构，并且防火涂料耐火性能也较好。