On-Line Detection of Polymer Melt Flow Instabilities in a Capillary Rheometer

被引：0

作者：

Palza, H. ^{[1
]}

Naue, I. F. C. ^{[1
]}

Wilhelm, M. ^{[1
]}

Filipe, S. ^{[1
]}

Becker, A. ^{[1
]}

Sunder, J. ^{[1
]}

Goettfert, A. ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Technol KIT, Inst Tech Chem & Polymerchem, D-76131 Karlsruhe, Germany

来源：

KGK-KAUTSCHUK GUMMI KUNSTSTOFFE | 2010年 / 63卷 / 10期

关键词：

Melt flow instabilities; Sharkskin; Melt fracture; Polyolefins; Processing; Slip process; Capillary rheometer; SITU PRESSURE-FLUCTUATIONS; SHARKSKIN PHENOMENON; EXTRUSION INSTABILITIES; SURFACE INSTABILITIES; SLIP TRANSITION; FRACTURE; SHEAR; POLYETHYLENE;

D O I：

暂无

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Polymer melt flow instabilities limit the optimum throughput conditions in the plastic processing industry with high economic and environmental consequences. A new set-up able to measure on-line pressure fluctuations inside a slit-die arising from polymer melt flow instabilities is introduced by using a capillary rheometer. This set-up consists of three high sensitive piezoelectric pressure transducers located inside a slit-die together with the application of advanced mathematical tools to process the acquired time dependent pressure signals. Our novel tool improves the time resolution by a factor of similar to 10(3) and under optimum conditions pressure fluctuations about 10(-5) bar can be detected. Examples of these pressure oscillations arising from the main melt flow instabilities typically observed during extrusion based processes of commercial polyethylenes are presented.

引用

页码：456 / 461

页数：6

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