ADDITION OF THE FORCE MEASUREMENT CAPABILITY TO A COMMERCIALLY AVAILABLE EXTENSIONAL RHEOMETER (CABER)

Autor: Jint Nijman, Christopher O. Klein, Manfred Wilhelm, Ingo F. C. Naue
Rok vydání: 2009
Předmět:
Zdroj: Soft Materials. 7:242-257
ISSN: 1539-4468
1539-445X
DOI: 10.1080/15394450903344603
Popis: The Capillary Breakup Extensional Rheometer (CaBER) is the only commercially available elongational rheometer. The CaBER can measure the diameter of a low viscous sample under stretching as a function of time. The analysis of this setup is consequently limited to the time dependent diameter of the capillaries D (t). Some samples do not develop a proper capillary flow, because of, for example, a lack of a substantial surface tension or a cylindrical fluid filament. As a consequence the interpretation of the results based on D (t) is problematic. On the other hand there is a huge fundamental industrial interest in measuring properties like strand formation, stickiness, spreadability, and so on. These properties are related to the extensional properties, specifically the elongational viscosity of a sample. Therefore, additional information beside D (t) is needed. In this publication a newly developed extension of the CaBER is presented and first applications are shown. The viscous sample is placed between tw...
Databáze: OpenAIRE
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