From melt flow index to rheogram

@article{Shenoy1983FromMF,
  title={From melt flow index to rheogram},
  author={A. Shenoy and S. Chattopadhyay and V. M. Nadkarni},
  journal={Rheologica Acta},
  year={1983},
  volume={22},
  pages={90-101}
}
A knowledge of the complete flow curve or rheogram of a polymeric melt depicting the variation of the melt viscosity over industrially relevant range of shear rate and temperature is essential in the design of polymer processing equipment, process optimization and trouble-shooting. These data are generated on sophisticated rheometers that are beyond the financial and technical means of most plastics processors. The only flow parameter available to the processor is the melt flow index of the… Expand

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References

SHOWING 1-7 OF 7 REFERENCES
Rheological properties of polymer melts
A new method of treating experimental data on the viscous and viscoelastic properties of various polymer melts is suggested. The dependence of the apparent viscosity on the molecular weight,Expand
Prediction of high density polyethylene processing behavior from rheological measurements
In order to predict the processing behavior of a high density polyethylene resin one must know the resin flow behavior over a wide range of shear rates. Low shear properties are important inExpand
Steady‐State Melt Flow Behavior of Polyethylene Blends
The steady‐state melt flow behavior covering six decades of shear rate was studied for various types of polyethylene and their blends. Two instruments were used. The Kepe's cone and plateExpand
Polyethylene Melt Viscosity: Shear Rate‐Temperature Superposition
The steady‐state melt viscosities of both high density and low density polyethylene have been investigated for a series of samples over four decades of shear rate and a range of temperatures fromExpand
Viscosity of particle filled polymer melts
SummaryViscosities of particle filled polymer melts were measured at fairly low shear rate. Particles were glass beads, glass balloons, and silas balloons. Polymers were polyethylene and polystyrene.Expand
Plastics Compounding 25 (Sept./Oct
  • 1978
Properties of Polymers, p. 488
  • Elsevier Scientific Publishing Company (Amsterdam
  • 1976