Rheological test methods
The UL Thermoplastics Testing Center can carry out the following rheological tests for you.
The reference standards used for each test method are listed in the right-hand table column.
| Rheological test methods | Standards |
| Melt index Melt mass flow rate (MFR) Melt volume flow rate (MVR) |
ISO 1133 ASTM D1238 MVR |
| Melt index f(t)* | DIN ISO 1133 |
| Melt index f(t)** | DIN ISO 1133 |
| Melt viscosity | ISO 11443 DIN 54811 |
| Solution viscosity (with/without film) | ISO 1628-1 / 4 DIN 51562-3 |
| Oscillatory shearing (rotational rheometer) e.g. zero shear viscosity, frequency sweep, thermal stability |
ISO 6721-10 ASTM D4440-01 |
| Special rheological tests Capillary and rotational rheometer |
* Intrinsic melt mass flow rate (IMFR)
** Intrinsic melt volume flow rate (IMVR)
