Vica softening point refers to engineering plastics, general plastics and other polymer samples in the liquid heat transfer medium, under a certain load, a certain rate of temperature, is 1mm2 needle pressed into the depth of 1mm temperature.
Vica softening point is used to control polymer quality and as an indicator to identify the thermal properties of new varieties. It does not represent the temperature at which the material is used.
The English Heat deflection temperature (HDT) is a parameter aimed at expressing the relationship between the Heat absorption and the deflection of the object measured.
The thermal deformation temperature is measured by the temperature recorded under the specified load and shape variables.
Softening point: the temperature at which a substance softens.
Mainly refers to the temperature at which the amorphous polymer begins to soften.
It is not only related to the structure of polymer, but also related to its molecular weight.
There are many methods of determination.
The results of different determination methods are often inconsistent.
More commonly used are Vicat and global law.
Thermal deformation temperature: Measure the deformation (or softening) of a specimen under a certain load to a certain temperature.
Thermal deformation temperature: Take the standard spline as an example, under a certain heating rate and load, the corresponding temperature when the spline deflection changes by 0.21mm.
Vica softening point: at a certain heating rate and load, the indenter into the standard sample 1mm of the corresponding temperature.
There are two standards for heating rate and load.
Post time: Aug-01-2022