Determination of Glass Transition Temperature||Glass Transition Temperature (Part-3) #dilatometry
Channel: PaathShaaala
Date: 2021-05-17

Determination of Glass Transition Temperature

The classical way of measuring glass transition temperature is to perform a series of mechanical tests over the expected temperature range. 
The glass transition temperature is indicated where there is a significant drop off in material strength.
The use of specific volumes for the determination of Tg is one of the common methods of analysis using dilatometry.
Nowadays, with the use of modern thermal analysis, testing for glass transition temperature has become significantly faster and cheaper in recent years. 
The most standard thermal methods for determining glass transition temperature are 
Differential Thermal Analysis (DTA), 
Thermo Mechanical Analysis (TMA), 
Dynamic Mechanical Analysis (DMA), and 
Differential Scanning Calorimetry (DSC).
A dilatometer is used to determine the coefficient of expansion, Tg, and Tm of the polymer. 
Solution viscosity is a measure of the size or extension in space of polymer molecules. 
As we know when a polymer or any other material passes from one state to another, properties are gradually changing.