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http://nopr.niscpr.res.in/handle/123456789/19206| Title: | Some studies on melt flow behaviour of poly(ethylene terephthalate) |
| Authors: | Verma, Rajkumar Bhuvanesh, Y C Gupta, V B Manabe, T Jalan, Rajesh |
| Issue Date: | Mar-1991 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The flow behaviour of poly(ethylene terephthalate) melt has been studied on a capillary rheometer in the temperature range 275-295°C. The intrinsic viscosities of the extrudates were also determined. The melt flow data was corrected for the molecular weight reduction that occurs in the rheometer during the measurement with the help of the intrinsic viscosity data. An empirical equation relating the zero shear melt viscosity to the intrinsic viscosity of the polymer has been derived and it is shown to predict the measured melt viscosity quite accurately. The activation energy for flow has been estimated to be 16.5 kcal/mol. The viscosity profiles along the capillary radius have been graphically illustrated. The present analysis shows that PET melt flowing through a capillary is Newtonian close to the capillary axis and pseudo-plastic close to the wall of the capillary. |
| Page(s): | 39-45 |
| ISSN: | 0975-1025 (Online); 0971-0426 (Print) |
| Appears in Collections: | Special issue: IJFTR Vol.16(1) [March 1991] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJFTR 16(1) 39-45.pdf | 1.53 MB | Adobe PDF | View/Open |
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