HDPE在挤出温度条件下流变行为的研究

STUDY ON THE RHEOLOGICAL BEHAVIORS OF HDPE UNDER THE CONDITION OF THE EXTRUSION TEMPERATURE

利用毛细管流变仪研究了不同温度条件下HDPE的流变行为。测定了不同温度条件下HDPE的流变特性并绘制了流变曲线。流变曲线的分析表明,HDPE的流变行为受温度的影响很大,同时由于该材料本身的特性,在挤出加工温度条件下,其流变曲线存在第一及第二光滑区。随剪切速率增加,表观粘度下降。

The rheologieal behaviors under the condition of the extrusion temperature of high-density polyethylene (HDPE) are studied by capillary rheometer. The results show that the rheologicai behaviors are greatly influenced by the temperature and it also exists the first and second clean area in the extrusion processing.