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材料工程  2009 

芳香族聚酰亚胺泡沫的隔热性能研究

, PP. 43-46

Keywords: 聚酰亚胺泡沫,热导率,静态法,动态法

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Abstract:

利用DMTA和自制热导测试仪测试了4种自制芳香族聚酰亚胺泡沫的玻璃化转变温度(Tg)、静态温度下的热导率(λ)和动态温度作用下的隔热性能;分析了一定厚度的聚酰亚胺泡沫的密度和温度影响热导率的规律;考察了聚酰亚胺泡沫在动态温度下的隔热性能.结果表明单体(尤其是二胺)刚性越大,聚酰亚胺泡沫的玻璃化转变温度越高;在密度为50~140kg/m3范围内,聚酰亚胺泡沫的密度对热导率的影响较小;在温度为50~350℃范围内,温度的升高使聚酰亚胺泡沫的热导率增加;在动态温度下,聚酰亚胺泡沫表现出明显的热滞后性.

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