Abstract
A perturbation method was introduced to investigate the melting phenomena of polystyrene (PS) and polypropylene (PP) blend in a twin-screw extruder. A sliding barrel technique was used to realize the on-line visualization of the processes and to obtain the temperature and pressure profiles along the extrusion region. The melting behavior of PS/PP (80:20) blend was studied under various ratios of the flow rate (Q) over the screw rpm (N). It was found that the melting processes of the PS/PP blend in the TSE can be divided into three sections. Most of the melting occurred in a narrow transition from the partially filled region to the fully filled region. No large deformation of solid polymer pellets was found for all the processes studied here. The relative amount of solid concentration in the flow can be obtained through this perturbation method. It was shown that the solid concentration at the beginning of the fully filled region increased as the ratio of Q/N increased.
Original language | English |
---|---|
Pages | 122-127 |
Number of pages | 6 |
State | Published - 2004 |
Externally published | Yes |
Event | ANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States Duration: 16 May 2004 → 20 May 2004 |
Conference
Conference | ANTEC 2004 - Annual Technical Conference Proceedings |
---|---|
Country/Territory | United States |
City | Chicago, IL. |
Period | 16/05/04 → 20/05/04 |
Keywords
- Melting
- On-line visualization
- Perturbation
- Twin-screw extrusion