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载荷与氯离子耦合作用下玻璃纤维增强不饱和聚酯复合材料吸湿性能

, PP. 1173-1178

Keywords: GFRP,应力,氯离子,吸湿,Langmuir模型

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Abstract:

通过重物加载,并在氯离子环境中浸泡不同试验周期后,测试玻璃纤维增强不饱和聚酯(GFRP)复合材料的吸湿率,研究GFRP在不同应力水平下的吸湿规律。结果表明:浸泡初期GFRP的吸湿率随时间增长较快,随后吸湿率增长逐渐变慢,当浸泡达到180d后,吸湿率下降;GFRP的吸湿率随载荷的增加而下降,受到不同载荷大小的试件其吸湿率随时间变化规律相似;GFRP在氯离子环境中的吸湿行为呈现non-Fickian特征。基于Langmuir模型并考虑由于材料水解而发生材料"失重"的吸湿特性,提出了可描述复合材料吸湿曲线上升和下降趋势的吸湿模型,该模型可以较好地预测GFRP的吸湿量。

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