首页|热氧、湿热和热水老化对T300/BHEP复合材料玻璃化转变温度的影响

热氧、湿热和热水老化对T300/BHEP复合材料玻璃化转变温度的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
通过对碳纤维/环氧复合材料(T300/BHEP)进行热氧、湿热和热水老化研究,得到了材料的质量变化率和Tg随老化条件的演变规律,分析了老化机理.结果表明:T300/BHEP复合材料在热氧老化条件下,因后固化和自由体积收缩,Tg升高;在湿热和热水老化条件下,因水分塑化作用和水对分子链间氢键的破坏,Tg降低.三种老化条件下,Tg与质量变化率均呈线性关系.对比80℃热氧、80℃/RH75%湿热和80℃热水老化条件下的结果,发现水分的塑化作用对Tg的影响要大于因热的作用产生的后固化,且湿度越大,Tg降低越明显.
Changes of Tg of T300/BHEP Composite in Thermo-Oxidative,Hygrothermal and Hot Water Aging Conditions
The aging of carbon fiber/epoxy resin composite ( T300/BHEP) in thermo-oxidative, hygrothermal and hot water aging conditions are studied , the changes of weight and glass transition temperature ( Tg) with aging conditions are tested and analyzed the aging mechanisms. Results show that the Tg of T300/BHEP composite increases in thermo-oxidative aging conditions because of post curing and free volume shrinkage, and the plasticization of water causes decrease of Tg in hygrothermal and hot water aging conditions. In these three aging conditions, Tg is linear with the weight change ratio. Through contrasting the results of 80℃ thermal-oxidative aging, 80℃/RH75％ hygrothermal aging and 80℃ hot water aging,the plasticization of water have more impact on Tg than post curing, and Tg decreases more significantly when the humidity is higher.

Thermo-oxidative agingHot water agingCompositesGlass transition temperature

詹茂盛、李小换、许文、刘宇

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北京航空航天大学材料学院,北京,100191

航天材料及工艺研究所,北京,100076

热氧老化 热水老化 复合材料 玻璃化转变温度

2011

宇航材料工艺
航天材料及工艺研究所

宇航材料工艺

CSTPCDCSCD北大核心
影响因子：0.378
ISSN：1007-2330
年,卷(期)：2011.41(3)
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