Abstract
Ground rubber tire (GRT) and its chlorinated derivative (CI-GRT) were filled in a plasticized polyvinylchloride (PVC) compound. Thermorheological studies of the PVC compound and its blends with GRT and CI-GRT were done using a shear dynamic oscillating rheometer. Rheological complexity of the compositions was analyzed from double logarithmic plot of storage modulus (G′) and loss modulus (G″). Log-log plot of complex shear viscosity (η*) and its real component (η′) against frequency (ω) revealed higher degree of interaction between CI-GRT and PVC compared to that between GRT and PVC. Activation energy for the flow of the PVC/CI-GRT blend was lower than that of the PVC/GRT blend indicating retention of the network structure of the former during flow; whereas for the later lower viscosity and hence higher free volume enabled it to loose entanglement by shear force at higher temperature. PVC/CI-GRT blend exhibited lower die swell and better extrutdate surface smoothness than those of PVC/GRT blend, when extruded at a shear rate of 900 s-1.
| Original language | English |
|---|---|
| Pages (from-to) | 164-168 |
| Number of pages | 5 |
| Journal | KGK-Kautschuk und Gummi Kunststoffe |
| Volume | 55 |
| Issue number | 4 |
| State | Published - Apr 2002 |
| Externally published | Yes |
Keywords
- Activation energy for flow
- Chlorinated ground rubber tire
- Extrusion characteristics
- Ground rubber tire
- Polyvinylchloride
- Thermorheological analysis