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Polymers Main Page > Research Area 2003 > Processing Characterization Group
 

Processing Characterization Group

 

Our research seeks to advance the understanding and control of polymeric materials under flow through the use and development of advanced measurement technology. The motivation behind our effort is two-fold:

At a basic level, if one can conduct fundamental measurements of important phenomenon that occur during flow or processing, then one can achieve a deeper understanding of how to control the flow and the properties of the final product.

One example of this approach is our research into extrusion instabilities, where we are carrying out a detailed study of the flow fields that underlie the instability known as sharkskin. A second example is our investigation of the effects of confinement on the development of structure in sheared polymer blends.

An apparatus
 
At a more applied level, polymer processors suffer from limited real-time information regarding critical properties of polymeric materials during processing operations such as extrusion or injection molding. The ability to measure these critical parameters (such as temperature, composition, orientation) would enable real time control that would lead to higher product quality and reduced waste. This is the philosophy behind our projects to conduct measure composition through an on-line dielectric spectroscopy apparatus. We are also heavily involved in the use of fluorescence as a probe to conduct on-line measurements of temperature and material orientation.
 
Many of our projects are conducted in collaboration with industrial partners, which range in size from start-up companies to large multi-national corporations.
 
 
 
NIST Materials Science & Engineering Laboratory - Polymers Division
 
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