A study on a joining mechanism of the inteface between two different polymer in a reaction field which is formed by high-intensity ultrasonic wave

1.我们制作了一个用于连接熔融型塑料试件的剪切模式连接系统和一个用于连接非熔融型塑料试件的剪切模式连接系统。研究了一种高效换能器的装配方法。研究结果表明，该传感器采用小螺距螺杆是合适的.对连接过程考虑的研究分为温升机理和连接机理两个阶段。(1)建立了剪切振动条件下的温升机理模型。并在此基础上进行了仿真计算。因此，温度上升在较低频率下主要由摩擦引起，而在较高频率下则由粘性引起。此外，我们还发现试样的摩擦系数越小，接合面的温升越高。(2)为了阐明连接机理，我们用电子能谱（ESCA）研究了连接部分的分子结构。此外，我们还进行了接头强度测试，并利用扫描电镜设备对接头强度测试后的试样断口进行了观察。从这个调查中，我们得出的结论是，加入机制分为三类。这是新的分子组合互扩散和锚效应的产生。

1. We made a longitudinal-mode joining system for joining of melting-type plastic specimens and a shear-mode system for non-melting plastic specimens. We also studied the assembling method for a high-efficiency transducer. It was find that usage of fine-pitch screw is suitable for the transducer.2. The study of the consideration of the joining process was divided into two stages of temperature rise mechanism and joining mechanism.(1) The model of the temperature rise mechanism was made under the shear-mode vibration conditions. The simulations, which are based on the model, were carried out. Consequently, the temperature rise is caused mainly by friction at lower frequencies and that is caused by viscosity at the higher frequencies. Moreover, we found that lower friction coefficient of the specimen makes higher temperature rise of the joining surface.(2) In order to clarify the joining mechanism, we investigated the molecule structure of the joined part by means ef X-ray analysis method (ESCA). Furthermore, we carried out the joint strength testing and observations of fractured part of the specimens after joint strength testing by means of SEM equipment. From this investigation, we conclude that the joining mechanism is divided into three categories. these are production of new molecular combination interdiffusion and anchor effect.