| 2-氢七氟丙烷熄灭聚甲基丙烯酸甲酯燃烧火焰的实验研究 |
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| 引用本文： | 胡永华,李疏芬.2-氢七氟丙烷熄灭聚甲基丙烯酸甲酯燃烧火焰的实验研究[J].火灾科学,2008,17(1):34-39. |
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| 作者姓名： | 胡永华 李疏芬 |
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| 作者单位： | 中国科学技术大学,火灾科学国家重点实验室和化学物理系,安徽,合肥,230026 |
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| 摘 要： | 采用二视窗小型燃烧室和数码摄像技术分别研究了2-氢七氟丙烷和二氧化碳对聚甲基丙烯酸甲酯(RMMA)燃烧火焰的熄灭过程;探讨了2-氢七氟丙烷对PMMA的点火延迟时间、火焰形貌和燃烧速率的影响;同时,运用傅立叶变换红外光谱(FTIR)对PMMA熄火表面的化学成份进行了分析.结果发现:极低浓度的2-氢七氟丙烷不仅不能灭火反而还能够促进PMMA的点火和燃烧,但在灭火剂浓度相对较高的情况下,2-氢七氟丙烷抑制样品点火和燃烧的能力要远高于二氧化碳.与二氧化碳灭火剂相比,2-氢七氟丙烷具有灭火浓度低、灭火效率高和灭火速度快等明显优点.此外,FTIR的分析结果显示PMMA熄火表面的化学成份没有明显变化,这表明2-氢七氟丙烷对RMMA燃烧火焰的熄灭作用可能主要是发生在气相中.
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| 关 键 词： | 2-氢七氟丙烷 聚甲基丙烯酸甲酯 燃烧火焰 灭火 傅立叶变换红外光谱 |
| 文章编号： | 1004-5309（2008）-0034-06 |
| 收稿时间： | 2007-04-11 |
| 修稿时间： | 2007-11-13 |
Experimental Investigations on Suppression of Combustion Flames of Poly(Methyl methacrylate) by 2H-Heptafluoropropane |
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| HU Yong-hua and LI Shu-fen.Experimental Investigations on Suppression of Combustion Flames of Poly(Methyl methacrylate) by 2H-Heptafluoropropane[J].Fire Safety Science,2008,17(1):34-39. |
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| Authors: | HU Yong-hua and LI Shu-fen |
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| Institution: | HU Yong-hua,LI Shu-fen(State Key Laboratory of Fire Science,Department of Chemical Physics,University of Science , Technology of China,Hefei 230026,China) |
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| Abstract: | The extinguishment processes of combustion flames of PMMA by 2H-heptafluoropropane and CO_2 were investigated through using a laboratory-scale combustion chamber with two parallel glass windows,and the digital photographing technology.The effects of 2H-heptafluoropropane on the ignition delay time,the shape of combustion flame and the burning rate of PMMA were explored.At the same time,chemical compositions of extinguished surfaces of PMMA at different ambiences were analyzed by FTIR.The results indicated t... |
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| Keywords: | 2-H-heptafluoropropane PMMA combustion flame fire suppression FTIR |
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