This standard specifies a method for determining the transient extensional viscosity of polymer melts, providing a unified evaluation basis for the extensional flow behavior of materials during processing. The method requires uniaxial stretching of the material under constant strain rate and constant temperature conditions to measure its viscosity changes. To perform this test, an extensional rheometer capable of precise uniaxial stretching control or an advanced rotational rheometer equipped with specialized extensional fixtures is required. These instruments must possess precise temperature control and strain control capabilities.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G31 | ICS | 83.080.01 |
| Release Date | 2021-08-20 00:00:00 | Implementation Date | 2022-03-01 00:00:00 |
