Glass Transition Measurement

Principles and Techniques for Accurate Determination of the Glass Transition

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Glass Transition Measurement
Glass Transitions of Polystyrene
Glass Transition of Different Rubbers
Glass Transition of Different Rubbers
Glass Transition of Polymers
Glass Transition of Polymers
Glass Transitions of PVC and CPVC
Different Glass Transition Temperatures

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FAQ

Which main factors influence the glass transition?

Curing/crosslinking degree, plasticizers, crystallinity and thermal history influence the glass transition.
 

What are typical results for glass transition obtained from the DSC heat flow curve?

Glass transition temperature, step height, which corresponds to specific heat capacity cp and width of the glass transition.
 

Why is knowledge of glass transition temperature important?

  • For determination of the maximum use temperature of the material
  • For adjusting process parameters if the material has to be processed in a certain state
  • For determination of curing degree of thermosetting materials
  • For determination if a material is crystalline, amorphous or semi-crystalline
     

How can glass transition be determined above 700 °C?

Glass transition can be measured in a high temperature range using a TGA/DSC.
 

What are the most sensitive thermal analysis techniques for determining glass transition?

The sensitivity for glass transition increases in the following order: TGA/DSC, DSC, temperature modulated DSC, TMA, Differential Load TMA (DLTMA), and finally DMA. This is due to the order of magnitude the physical property increases that is measured with the respective technique.