【作者】 于运花； 杨小平； 周同悦； 王莉莉；

【Author】 Yu Yunhua~1,Yang Xiaoping~1,Zhou Tongyue~1,Wang Lili~(1,2) (1 Institute of Carbon Fiber and Composites,Beijing University of Chemical Technology,Beijng 100029; 2 Beijing FRP Research and Design Insititute,Beijing 102101)

【机构】 北京化工大学碳纤维及复合材料研究所； 北京玻璃钢研究设计院；

【摘要】 结合乙烯基酯树脂（VE）浇注体在65℃3%NaCl溶液、5%H₂SO₄溶液和10% NaOH溶液中的老化行为,对其碳纤维复合材料（CF/VE）的吸湿特性、静态和动态力学性能进行了对比分析。结果表明,VE浇注体与CF/VE复合材料在65℃3%NaCl溶液中的吸湿行为符合Fick定律,在5%H₂SO₄溶液中,吸湿前期符合Fick定律,但后期吸湿率略有下降;在10%NaOH溶液中由于水解的发生,浸泡后期出现急剧增重现象。VE浇注体与其复合材料的力学性能和T_g的变化趋势与其吸湿行为相对应,在盐和酸介质中,均为浸泡初期迅速下降,随吸湿达到饱和而下降平缓,趋于稳定值;而在碱介质中,吸湿后期呈下降趋势,在10%NaOH水溶液中存在明显的化学老化现象,而在盐和酸介质中并不明显。更多还原

【Abstract】 Combined with the chemical environment aging behavior of vinyl ester resin（VE） in 3%NaCl、5%H₂SO₄ and 10%NaOH aqueous solution at 65℃,the absorption characteristics, static and dynamic mechanical properties of its carbon fiber composite（CF/VE） were analyzed. The result shows that VE and CF/VE absorption obey Fick’s law in 3%NaCl solution,while after long time immersion in 5%H₂SO₄ and 10%NaOH solution,there is a departure from the Fick’s law,there being a clear increase in moisture content in NaOH solution because of the hydrolysis, while in 5%H₂SO₄ there is a little decrease in moisture content.During immersion in the salt and acid solution,the flexural strength and T_g of VE and CF/VE decreased clearly at first stage,then tended to a constant,while in the alkali solution,they tended to decrease again,showing a poor resistant to aging in NaOH solution than in salt and H₂SO₄ solution.更多还原