Rheometry of polymer melts using processing machines

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• 作者：Walter Friesenbichler ; Andreas Neunhäuserer…
• 刊名：Korea-Australia Rheology Journal
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：28
• 期：3
• 页码：167-174
• 全文大小：1,787 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Mechanical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  Soft and Granular Matter, Complex Fluids and Microfluidics
  Food Sciences
  
• 出版者：The Korean Society of Rheology and Australian Society of Rheology, co-published with Springer
• ISSN：2093-7660
• 卷排序：28

文摘

The technology of slit-die rheometry came into practice in the early 1960s. This technique enables engineers to measure the pressure drop very precisely along the slit die. Furthermore, slit-die rheometry widens up the measurable shear rate range and it is possible to characterize rheological properties of complicated materials such as wall slipping PVCs and high-filled compounds like long fiber reinforced thermoplastics and PIM-Feedstocks. With the use of slit-die systems in polymer processing machines e.g., Rauwendaal extrusion rheometer, by-pass extrusion rheometer, injection molding machine rheometers, new possibilities regarding rheological characterization of thermoplastics and elastomers at processing conditions near to practice opened up. Special slit-die systems allow the examination of the pressure-dependent viscosity and the characterization of cross-linking elastomers because of melt preparation and reachable shear rates comparable to typical processing conditions. As a result of the viscous dissipation in shear and elongational flows, when performing rheological measurements for high-viscous elastomers, temperature-correction of the apparent values has to be made. This technique was refined over the last years at Montanuniversitaet. Nowadays it is possible to characterize all sorts of rheological complicated polymeric materials under process- relevant conditions with viscosity values fully temperature corrected.Keywordsapplied rheometryslit-dietemperature correctionpressure dependencyrubber compound