Gradus
Vol 4, No 2 (2017): Autumn (November)
DETERMINATION OF POLYMER MELTS FLOW-ACTIVATION ENERGY
Abstract
In this paper a method is shown to calculate the activation energy of flow of high density polyethylene (HDPE), polystyrene (PS) and polycarbonate (PC). The importance of polymer melt flow properties during processing has required continuous research of polymer melt rheology. In the previous article [1] we described how to measure polycarbonate shear viscosity between 100 to 105 s-1 shear-rate region with standard and non-standard equipment This article represent that shear viscosity and activation energy of flow of the polymers depend on the chemical structure. It was found that more rigid molecular structure results higher values.
Keywords
Keywords: rheology, activation energy, polycarbonate, polyethylene, polystyrene,
References
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