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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Ultrasonic characterization of the quality of an epoxy resin polymerization
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Ultrasonic characterization of the quality of an epoxy resin polymerization

机译：超声表征环氧树脂聚合的质量

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This work concerns monitoring the polymerization of an epoxy resin and its hardener. An ultrasonic pulse echo technique was used to monitor the attenuation, the phase velocity, and the acoustic impedance of the resin as a function of time. The first two parameters give information about the average state of the hardening of the resin itself. The third parameter, acoustic impedance, indicates the state of the hardening of the resin at the interface with the vessel. These parameters are determined from spectral properties of echoes extracted from the experimental echo waveforms. Experiments were made for different proportions of hardener and allowed a determination of the best mixture (10% of hardener) that corresponds to the manufacturer's recommended value. Analysis of the results shows a progressive hardening from the center of the resin toward the walls of the vessel.
机译：这项工作涉及监视环氧树脂及其固化剂的聚合。超声脉冲回波技术用于监测树脂的衰减，相速度和声阻抗随时间的变化。前两个参数给出有关树脂本身硬化平均状态的信息。第三个参数，即声阻抗，表示树脂在与容器的界面处的硬化状态。这些参数由从实验回波波形提取的回波的光谱特性确定。针对不同比例的硬化剂进行了实验，并确定了与制造商建议值相对应的最佳混合物（硬化剂的10％）。结果分析表明，从树脂中心向容器壁逐渐硬化。

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