| 引用本文: | 黄演,王国建.一体化膨胀型防火涂料的热解机理研究[J].材料科学与工艺,2014,22(3):74-79.DOI:10.11951/j.issn.1005-0299.20140313. |
| HUANG Yan,WANG Guojian.Thermal decomposition of an intrinsic intumescent fire resistant coating[J].Materials Science and Technology,2014,22(3):74-79.DOI:10.11951/j.issn.1005-0299.20140313. |
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| 摘要: |
| 为解决传统防火涂料的装饰性问题,设计并合成了一种一体化膨胀型防火涂料.采用热红联用技术对该防火涂料的热解行为进行了研究,发现其热解过程可以分为4个阶段:第1阶段后期,炭化反应开始；第2阶段不稳定磷酸酯结构的断裂释放出CO2等气体,使熔融炭化物发生初步膨胀；第3阶段气体产物使炭化层进一步膨胀,最后硬化形成多孔炭化层；最终阶段炭化层高温热解.研究发现该防火涂料的热解反应发生顺序符合膨胀防火体系的要求,可以顺利地形成具有多孔结构的炭化层来保护基材. |
| 关键词: 一体化膨胀型防火涂料 热解 炭化 发泡 膨胀 |
| DOI：10.11951/j.issn.1005-0299.20140313 |
| 分类号:TU56+1.66 |
| 基金项目:广东省教育部产学研结合项目(2010A090200004). |
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| Thermal decomposition of an intrinsic intumescent fire resistant coating |
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HUANG Yan1, WANG Guojian1,2
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(1.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China; 2. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Shanghai 201804, China)
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| Abstract: |
| As traditional fire resistant coating systems are not transparent, an intrinsic intumescent fire resistant coating was designed and synthesized. Its thermal decomposition behavior was studied by means of thermo gravimetric analysis/infrared spectrometry coupling technique. The results showed that its decomposition process could be divided into four steps. In the end of the first step, charring began; in the next step, CO2 was released by scission of P-O-C linkages and a reactive intumescent char layer was formed; on further heating to the third step, a further intumescing process happened and then the char structures solidified; in the final step, the dominant reactions were destruction of char structures. The decomposition sequence of this intumescent fire resistant coating was proper for a good intumescent process. |
| Key words: intrinsic intumescent fire resistant coating thermal decomposition charring blowing intumescence |
