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The glass temperature transition is for glass, polymers, etc. (amorphous or semicrystalline materials), but not for leather.
The -125 degrees indicate the transition temperature of Polyethylene from glass.
Depending on the polymerization, the glass transition temperature will be between -13 C and -8 C; that's 8.6 F to 17.6 F.
Glass transition point describes the temperature when material (crystalline or semi-crystalline) loses its crystallinity but not necessary melts. For instance, polyethylene's glass transition temperature is around -140-150C, while its melting temperature is around 105-130C (light and heavy species).
Low-density polyethylene does exhibit a glass transition at around 150K.
The glass temperature transition is for glass, polymers, etc. (amorphous or semicrystalline materials), but not for leather.
The glass transition is a second order phase transition. For materials that have a glass transition temperature, below it they are hard and brittle and above it they are softer and "rubbery".
It doesn't have
Tm is temperature of melting. Tg is glass transition temperature.
The -125 degrees indicate the transition temperature of Polyethylene from glass.
cooling rate
Depending on the polymerization, the glass transition temperature will be between -13 C and -8 C; that's 8.6 F to 17.6 F.
30 degrees Centigrade
Around 70 degrees Celsius.
Polybutadiene rubber.(PBR)
-76 degree Centigrade.
Glass transition temperature of EVA depends significantly on the VA content. Decreasing VA contents result in a lower Tg. Usually Tg is about -20ºC, for higher VA content is -15ºC, for lower VA content is -40ºC.