GB/T 1632.4-2020 specifies the method for determining the viscosity of dilute solutions of polycarbonate (PC) molding and extrusion materials using a capillary viscometer (Ubbelohde viscometer). By measuring the intrinsic viscosity, it can be used to characterize the average molecular weight of PC materials, which is a key test for controlling their mechanical properties and processing stability.
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 | 83.080.20 |
| Release Date | 2020-12-14 00:00:00 | Implementation Date | 2021-07-01 00:00:00 |
