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首页> 外文期刊>International Polymer Processing: The Journal of the Polymer Processing Society >In-line Monitoring of PVC Melt Viscosity Using Dielectric Measurements
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In-line Monitoring of PVC Melt Viscosity Using Dielectric Measurements

机译：使用介电测量在线监测PVC熔体粘度

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摘要

A dielectric sensor,mounted in an extrusion die,was used to measure the dielectric properties of PVC melt during extrusion process.The dielectric permittivity and loss factor,of the polymer melt,were used to calculate the ionic viscosity and a dielectric viscosity index,which were correlated to the melt viscosity measured by slit rheometry equations.The viscosity of the PVC melt was varied by varying the level of chemical blowing agent (AZO) and processing aid (K400) in the polymer compound.The extrusion conditions;screw speed and heating zones,were fixed throughout the experiments.Strong correlation between the measured dielectric parameters and the melt viscosity was found to be consistent with established theoretical models.Therefore,this technique is capable of monitoring the viscosity of polymer melts accurately and reliably,in realtime,without disturbing the flow stream.
机译：安装在挤出模具中的电介质传感器用于测量挤出过程中PVC熔体的介电性能。聚合物熔体的介电常数和损耗因子用于计算离子粘度和介电粘度指数，通过狭缝流变学方程将熔体粘度与粘度相关联。通过改变高分子化合物中化学发泡剂（AZO）和加工助剂（K400）的含量来改变PVC熔体的粘度。挤出条件;螺杆速度和加热在整个实验中固定了这些区域。发现测得的介电参数与熔体粘度之间的强相关性与已建立的理论模型一致。因此，该技术能够实时，准确，实时地监测聚合物熔体的粘度扰流。

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