| 摘要: |
| 制备了环氧基水性超薄膨胀型钢结构防火涂料，采用FTIR，TGA和SEM等研究了高低温老化对其性能的影响.结果表明：防火涂料的防火性能、热稳定性、高温耐烧蚀性以及炭化层的强度均随着老化温度的提高而降低.这是由于防火涂料中的防火助剂随着高温老化过程的进行不断迁移损失所致，老化温度越高，防火助剂的损失越严重.进一步的研究表明，防火助剂的损失导致防火涂料的膨胀性能发生变化，炭化层的泡孔尺寸变大，分布不再均匀，从而使炭化层强度降低. |
| 关键词: 防火涂料 膨胀型 老化 温度 高低温老化 |
| DOI：103969/jissn1007 9629201501010 |
| 分类号: |
| 基金项目: |
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| Research on Anti thermoaging Properties of Water Borne Fire Retardant Coatings for Steel Structure |
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WANG Guojian, DONG Ying
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School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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| Abstract: |
| Anti thermoaging property of water borne ultra thin intumescent fire retardant coating for steel structure with epoxy resin as binder was studied by means of FTIR, TGA, SEM, etc. The results show that the fireproof property, thermal stability, anti ablation under high temperature and char strength of the coating decrease with the increase of the aging temperature. FTIR results indicate that this was because of the migration behavior of the fire retardant additives during the aging process. The fire retardant additives were lessened due to this migration behavior, and the loss of the additives increases with the rise of the aging temperature. Further study proved that the loss of the fire retardant additives changed the intumescent behavior. The cell size in the foam structure increases, and their distribution becomes non uniform; this also reduces the strength of the char layer. |
| Key words: fire retardant coating intumescent aging temperature thermo aging |
