单螺杆挤出过程中聚合物混合状态的超声在线监测技术  

Ultrasonic Online Monitoring Technology for Polymer Compounding State in a Single Screw Extruder

作　　者：陈友兴[1,2] 王召巴[1,2] 贾润礼[3] 韩婧[1] 褚红伟[2] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室 [2]中北大学电子测试技术国防重点实验室 [3]中北大学塑料研究所,山西太原030051

出　　处：《高分子材料科学与工程》2013年第10期94-97,共4页Polymer Materials Science & Engineering

基　　金：山西省科技攻关项目(20110321029);国家自然科学基金资助项目(61201412);山西省青年科技研究基金(2012021011-5)

摘　　要：单螺杆挤出过程中聚合物的混合状态会影响产品最终的性能。文中以超声检测技术为手段,在原有超声缓冲杆的基础上,研究了聚合物混合状态的在线监测技术、信号处理方法和状态表征。通过分析不同位置传感器的超声回波B扫描图和螺杆不同结构的回波信号选择有效数据,并用其方差作为聚合物混合状态的表征量,用样本电镜扫描图进行验证。实验结果得出,检测过程的B扫描图可以直观地判断聚合物的熔融和混合状态,特征信号幅度方差越大,说明聚合物混合越均匀,表明这种方法能够有效区分出聚合物混合的均匀性。In the process of single screw extrusion, the mixed state of the polymer will affect the performance of the final product. In this paper, the ultrasonic online monitoring technic, signal processing methods and state characterization for polymer compounding state were studied. The variance of valid data was used to represent polymer compounding state based on the ultrasonic B-scangram at different position sensors and the echo signals of different screw structures. Verified by the sample scan electron microscopy, the experimental results shows that the B scangram can visually distinguish the state of polymer. The polymer is mixed more evenly, the amplitude variance of signals is greater, implying that this method is effective to distinguish the uniformity of polymer mixture.

关 键 词：超声在线监测 聚合物 单螺杆挤出 混合状态 

分 类 号：TQ316.62[化学工程—高聚物工业]