Journal article
Extensional flow dynamics of polystyrene melt
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Department of Mechanical Engineering, Technical University of Denmark3
Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark4
A linear polystyrene melt with broad molecular weight distribution (CAS 0993-53-6 from Aldrich) was characterized in extensional flow using a filament stretching rheometer. A series of measurements were performed, including (1) the startup of uniaxial extensional flow until steady state; (2) the strain controlled reversed (i.e., biaxial) flow following the startup of uniaxial flow; and (3) stress relaxation (i.e., keeping the strain unchanged) also following the startup of uniaxial flow.
The measurements were compared with the model by Narimissa and Wagner [J. Rheol. 60, 625–636 (2016)]. Good agreements at low extension rates and low strain values were observed. Higher deviations were observed at high rates under steady state conditions as well as during stress relaxation and reversed flow.
| Language: | English |
|---|---|
| Publisher: | The Society of Rheology |
| Year: | 2019 |
| Pages: | 829-835 |
| ISSN: | 15208516 and 01486055 |
| Types: | Journal article |
| DOI: | 10.1122/1.5110027 |
| ORCIDs: | Huang, Qian and Rasmussen, H. K. |
