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湿热环境对抽油杆CF/VE拉挤复合材料的影响

, PP. 131-136

Keywords: 碳纤维,乙烯基酯树脂,拉挤,复合材料,湿热环境

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Abstract:

研究了95℃蒸馏水环境中油田抽油杆用碳纤维/乙烯基酯树脂(CF/VE)拉挤复合材料的吸湿特性,以及材料的力学性能和动态热机械性能的变化,并观察了湿热老化前后该复合材料的表面和断口形貌。结果表明,CF/VE拉挤复合材料的吸湿行为符合菲克第二定律,材料的平衡含湿量Mm约为1.046%,水分在复合材料中的扩散系数约为2.233×10-6mm2/s;复合材料的性能下降趋势与吸湿率的增加趋势相对应,浸泡1176h后,弯曲强度和层间剪切强度的最终保留率分别约为49%和54%;DMTA及SEM结果表明,湿热环境导致该复合材料发生基体溶胀、塑化和界面脱粘,引起基体和界面形貌的变化,但未发生化学老化。

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