Journal article
A control scheme for filament stretching rheometers with application to polymer melts
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Computer Aided Process Engineering Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
Department of Mechanical Engineering, Technical University of Denmark4
Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark5
Coloplast Danmark AS6
We propose a new control scheme to maintain a constant strain rate of the mid-filament diameter in a filament stretching rheometer for polymer melts. The scheme is cast as a velocity algorithm and consists of a feed-back and a feed-forward contribution. The performance of the controller is demonstrated on a commercial low density polyethylene.
Several strain rates and experimental conditions are tested to demonstrate the necessity of the control parameters and the limits of both the control scheme and the experimental apparatus. When the control parameters are properly tuned, the algorithm ensures that the applied strain stays within 2% of the set point and measurements can be made up to Hencky strains of 6.5.
| Language: | English |
|---|---|
| Year: | 2013 |
| Pages: | 14-22 |
| ISSN: | 18732631 and 03770257 |
| Types: | Journal article |
| DOI: | 10.1016/j.jnnfm.2012.10.007 |
| ORCIDs: | Huusom, Jakob Kjøbsted , Huang, Qian , Rasmussen, Henrik K. , Skov, Anne Ladegaard and Hassager, Ole |
