Blog
Glass transition temperature
melting temperature
Thermal stability
Thermal resistance
The glass transition temperature is only limited to the amorphous regions of the polymer mass, which by passing through this temperature and receiving thermal energy by the mass of matter, the polymer chains that have found the energy needed to move, speed up the change in the volume of the matter against the temperature and The behavior of the material changes from brittle to ductile.
As the temperature increases in the melting temperature, nearly 80% of polymer chains are able to move independently without disturbing physical entanglements.
In polymers, due to the presence of both amorphous and crystalline regions together, in most cases the glass transition temperature is different from the temperature related to the thermal stability of the polymer. Assuming having two polymers with amorphous and pure crystal regions, the thermal stability for these two polymers is considered equivalent to the glass transition temperature and the melting temperature of the polymer, respectively. HDT temperature, in fact, is known as a suitable and alternative measure of glass transition temperature for estimating the maximum temperature of polymer use.
Thermal stability is the highest temperature at which a product can still maintain its mechanical properties.
Thermal resistance refers to the temperature at which the material starts to degrade, which is more relevant in the aerospace industry.
This post is written by MZ140005