2. Principle of TMA
This method is useful to determine glass transition temperature (Tg). The principle is “Change in heat indicate the change in the dimensional behaviour of the polymer” i.e. heat flow rate of any textile material is depend upon the dimension of the material and the dimension of the material is depend upon the time and temperature.
It measures weight in micron/minut. crystalline temperature is always 40 to 60 no less than melting temperature.
TMA is used for checking flame retardancy, halogen oriented compound is best suitable for flame retardancy.
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