Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
复制标题
PE 和 PS 共挤出流动中界面不稳定性的研究
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Agassant
中科院分区：
文献类型：
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作者：
R. Valette;P. Laure;Y. Demay;J. Agassant
摘要 使用工业和实验室设备在不同流量和温度下对聚乙烯和聚苯乙烯共挤出流的界面不稳定性进行了实验研究。稳定和不稳定的共挤出条件被确定为流量比、剪切速率和温度的函数。发现温度和流量比是最相关的参数。然后将实验结果与假设 White-Metzner 本构方程的稳定性分析进行比较。在 180°C 和 200°C 的温度下协议是公平的。然而，长波稳定性分析不足以预测所有实验数据。
Abstract The interface instability of the coextrusion flow of a polyethylene and a polystyrene is experimentally studied with industrial and laboratory equipments for various flow rates and temperature. Stable and unstable coextrusion conditions are identified as a function of flow rate ratio, shear rate and temperature. It is found that temperature and flow rate ratio are the most relevant parameters. Experimental results are then compared with stability analysis assuming White-Metzner constitutive equations. Agreement is fair at temperatures of 180°C and 200°C. However the longwave stability analysis is not sufficient to predict all experimental data.