How is plastic MFI calculated?

This obtained data was compared with standard polymer and cross checked. The temperature for the MFI calculation is taken 230°C and the standard weight is taken as the 3.2 kg. MFI of the material is calculated as the mass of the material in grams flowing per 10 min.

What temperature and load is preferable for polypropylene in MFI test?

Ratios between two melt flow rate values for one material at different gravimetric weights are often used as a measure for the broadness of the molecular weight distribution. Melt flow rate is very commonly used for polyolefins, polyethylene being measured at 190 °C and polypropylene at 230 °C.

What is melt flow index for polypropylene?

2.1 Materials The polypropylene used in this research is grade EH-102 of the company “PETKIM.” The most important reason for choosing this material is that its melt flow index (9.0–13.0 g/10 min) is high and it is possible to use this material in combination with relatively high filler contents.

What is the formula of flow index?

Flow index If = (W2-W1)/(logN1/N2) = slope of the flow curve.

How do you interpret a melt flow index?

Melt Flow Indexer Melt flow indices are often listed on data sheets of thermoplastic materials. In general, a higher MFI indicates a lower material viscosity, and when comparing polymers of the same class, a lower melt flow rate corresponds to a higher molecular weight and/or less branching.

How do you increase MFI of polypropylene?

You can increase MFI by mixing with some lubricant. However it may reduce mechanical properties. So it would be better to conduct a small scale experiment in advance to know the optimum amount of lubricant you should add.

Why K value of PVC is determined instead of MFI?

The problem is that PVC (especially plasticized PVC) is in many respects different form normal thermoplastic melts. You can rarely see MFI values for PVC products. Instead of this the so-called K-value is given, which relates to the molecular weight, thus indirectly to flowability.