Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST)
This document specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials:
—   Method A50 using a force of 10 N and a heating rate of 50 °C/h;
—   Method B50 using a force of 50 N and a heating rate of 50 °C/h;
—   Method A120 using a force of 10 N and a heating rate of 120 °C/h;
—   Method B120 using a force of 50 N and a heating rate of 120 °C/h.
The methods specified are applicable only to thermoplastics, for which they give a measure of the temperature at which the thermoplastics start to soften rapidly.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 306 |
| Publication Date | Not Available |
| Language | en - English |
| Page Count | |
| Revision Level | |
| Supercedes | |
| Committee | ISO/TC 61/SC 2 |