Application of ultrasound in the determination of fundamental extrusion performance: Residence time distribution measurement
Application of ultrasound in the determination of fundamental extrusion performance: Residence time distribution measurement
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DOI：
10.1002/pen.10009
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发表时间：
2003
影响因子：
3.2
通讯作者：
Zhigang Sun;C. Jen;C. Shih;D. A. Denelsbeck
中科院分区：
文献类型：
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作者：
Zhigang Sun;C. Jen;C. Shih;D. A. Denelsbeck
通过新型探头设计和快速数据采集，我们成功地在线超声监测了熔点、混合区和泵送区以及Werner & Pfleiderer 30毫米双螺杆挤出机的模具出口的停留时间分布（RTD），将超声探头安装在挤出机筒上的螺杆元件和模具上。实验体系为LDPE、碳酸钙填充LDPE和克拉通/LDPE共混体系。给出了挤出机各功能区的超声数据。利用超声测量的结果，对在挤出机混合区采用光学传感器与超声探头并列的光学RTD测量方法进行了评价。超声和光学结果的比较表明，超声技术可以作为光学技术的补充，对聚合物挤压过程中RTD的监测和理解起到很好的补充作用。
By means of new probe design and rapid data acquisition, we have succeeded in in-line ultrasonic monitoring of residence time distribution (RTD) at the melting, mixing, and pumping zones as well as at the die exit of a Werner & Pfleiderer 30-mm twin-screw extruder by mounting the ultrasonic probes on the extruder barrel over the screw elements and at the die. The experimental systems were LDPE, CaCO 3 -filled LDPE, and a Kraton/LDPE blend. The ultrasonic data at each of the extruder functional zones are presented. The ultrasonic results have been used to evaluate an optical RTD measurement method by using an optical sensor side by side with one ultrasonic probe at the mixing zone of the extruder. The comparison of the ultrasonic and optical results has shown that the presented ultrasonic technique could be a good complement to the optical technique in the monitoring and understanding of RTD during polymer extrusion processes.