| 耐高低温硅橡胶的研究 |
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| 引用本文： | 苏正涛,王景鹤.耐高低温硅橡胶的研究[J].航空材料学报,2006,26(3):207-212. |
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| 作者姓名： | 苏正涛 王景鹤 |
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| 作者单位： | 北京航空材料研究院,北京,100095 |
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| 摘 要： | 通过热空气老化试验研究了金属氧化物对提高甲基乙烯基硅橡胶(VMQ)、甲基苯基乙烯基硅橡胶(PVMQ)、三氟丙基甲基乙烯基硅橡胶(FVMQ)耐热性的作用;通过压缩耐寒系数试验和动态机械热分析(DMTA)研究了甲基乙烯基硅橡胶(VMQ)、甲基苯基乙烯基硅橡胶(PVMQ)和三氟丙基甲基乙烯基硅橡胶(FVMQ)的低温性能.试验结果表明:Fe2O3,Fe2O3/SnO2,SnO2,CeO2等金属氧化物可以显著提高硅橡胶的耐热性.光电子能谱(XPS)分析结果说明SnO2在热空气老化过程中从Sn 4被还原到Sn0,发生了多个电子转移的氧化还原反应,从而阻止了硅橡胶的热氧化自由基链增长,提高了硅橡胶的耐热空气老化性能;DMTA分析结果表明苯基硅橡胶和共聚氟硅橡胶具有非常优异的低温性能.
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| 关 键 词： | 硅橡胶 苯基硅橡胶 氟硅橡胶 金属氧化物 XPS DMTA |
| 文章编号： | 1005-5053(2006)03-0207-06 |
| 修稿时间： | 2006年1月20日 |
Properties of Silicone Rubber at High or Low Temperature |
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| SU Zheng-tao,WANG Jing-he.Properties of Silicone Rubber at High or Low Temperature[J].Journal of Aeronautical Materials,2006,26(3):207-212. |
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| Authors: | SU Zheng-tao WANG Jing-he |
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| Abstract: | The article mainly shows the properties of silicone rubber at high or low temperature.The effects of metal oxides Fe_2O_3,Fe_2O_3/SnO_2,SnO_2,CeO_2 on the thermal stability of methyl-vinyl silicone rubber(VMQ),methyl-phenyl-vinyl silicone rubber(PVMQ),and trifluoropropyl contained silicone rubber(FVMQ) were studied by heat aging test.Through coefficient of cold-resistance under compression and DMTA,the characters in low temperature of VMQ,PVMQ and FVMQ were also studied.Result shows that metal oxides such as Fe_2O_3,Fe_2O_3/SnO_2,SnO_2 and CeO_2 can greatly improve the thermal stability of silicon rubber.The analysis of x-ray photoelectron spectroscopy(XPS) showed that Sn+4 were reduced to Sn0 in silicone rubber during thermal air aging.The thermal stability of silicone rubber could be improved by some metal oxide.The results of DMTA showed that the rubber based on PVMQ,SKTFT-50,SKTFT-25 and the copolymer have excellent cold resistance. |
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| Keywords: | silicone rubber phenylsilicone rubber fluorosilicone rubber metal oxides XPS DMTA |
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