Melt Rheology of LDPE and Glass Bead Filled LDPE Composite

摘要: The effects of shear rates and temperatures on the melt viscosity (η w ) relationship between first normal stress difference (N 1 wall (τ low density polyethylene (LDPE) glass bead filled LDPE composite, over a temperature range from 130 to 170°C varied 10° 10 3 s -1 , have been investigated by employing capillary rheometer. With rise increasing decreases nonlinearly. flow obeys power law index increases with temperature. N is approximately an exponential function τ . dependence η basically accords Arrhenius expression. Under same test conditions, composite are somewhat lower than those pure melt. On basis predecessors' work, equation describing pressure drop has presented in this article. Good agreement shown predicted values measured data melts.