超声波在线监测环氧树脂中温固化过程实验研究

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (5): 11-15.

超声波在线监测环氧树脂中温固化过程实验研究

胡焱, 黄贵飞, 梁科, 谢家雨

中国民用航空飞行学院航空工程学院,广汉618307

收稿日期:2016-11-25 出版日期:2017-05-28 发布日期:2017-05-28
作者简介:胡焱(1973-),男,硕士,副教授,主要从事航空设备维修、测控方面的研究,1160443014@qq.com。
基金资助:
国家自然科学基金民航联合基金重点项目(U1233202);中国民航飞行学院校基金(J2012-23);中国民用航空飞行学院研究生创新项目(X2016-39)

EXPERIMENTAL STUDY OF ONLINE MONITORING CURING PROCESS OF EPOXY RESIN UNDER MEDIUM TEMPERATURE CONDITION BY ULTRASONIC TECHNIQUE

HU Yan, HUANG Gui-fei, LIANG Ke, XIE Jia-yu

Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, China

Received:2016-11-25 Online:2017-05-28 Published:2017-05-28

摘要/Abstract

摘要： 采用超声波透射法成功实现了实时在线监测环氧树脂在不同条件下的固化反应过程,研究了超声波振幅衰减随固化反应时间的变化关系,探讨了中温条件下模具厚度和玻璃纤维对环氧树脂固化反应过程的影响。结果表明:振幅衰减呈现出先增加后减小并趋于稳定的规律;随着固化反应的进行,振幅衰减能够准确地反映出环氧树脂体系出现凝胶点的时间和黏稠态—凝胶态—玻璃态各相态的变化过程。提高温度能缩短固化时间,增加厚度和玻璃纤维能在一定程度上延缓凝胶点出现的时间,并对其机理进行了讨论。超声波在线监测为环氧树脂基复合材料的加工成型和制作工艺提供了理论依据和重要的技术手段。

关键词: 超声波, 环氧树脂, 固化反应, 玻璃纤维, 振幅衰减

Abstract: Ultrasonic transmission technique is successfully employed to real-time online monitor curing process of epoxy resin under different conditions. The relationship between ultrasonic amplitude attenuation and curing time of epoxy resin as well as the effect of mould thickness and glass fiber on the curing reaction process of epoxy resin under medium temperature are investigated, respectively. Experimental results indicate that ultrasonic attenuation firstly increases then decreases and finally tends to be stable. As the curing reaction proceeds, the appeared time of gel point and the phase change process transformed from viscous-gel state to gel-glass state can be accurately measured by ultrasonic attenuation. It is shown that the curing time can be shorten by raising temperature, the appeared time of gel point can be delayed by adding thickness and glass fiber in some degree and their mechanisms are discussed. The ultrasonic online monitoring can provide a theoretical basis and important technical support for the molding and processing technology of epoxy resin composite materials.

Key words: ultrasonic, epoxy resin, curing reaction, glass fiber, attenuation

中图分类号:

TB332

胡焱, 黄贵飞, 梁科, 谢家雨. 超声波在线监测环氧树脂中温固化过程实验研究[J]. 玻璃钢/复合材料, 2017, 0(5): 11-15.

HU Yan, HUANG Gui-fei, LIANG Ke, XIE Jia-yu. EXPERIMENTAL STUDY OF ONLINE MONITORING CURING PROCESS OF EPOXY RESIN UNDER MEDIUM TEMPERATURE CONDITION BY ULTRASONIC TECHNIQUE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(5): 11-15.

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