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Thermal Properties
TGA: Thermal gravimetric analysis
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Typically used to determine thermal stability
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Analyze at fixed temperature (isothermal) or using a temperature ramp
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CTE: Coefficient of thermal expansion (dependent on Tg, modulus, and fillers)
TMA: Thermal mechanical analysis
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Expansion in z-direction vs. temperature; CTE is slope of line (distance moved/°C)
DSC: Differential scanning calorimetry
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Tg-Glass transition temperature (second order transition); material changes from glassy-rubbery
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Tm-Melt transition (first order transition)
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Below Tm or Tg materials harden (increase modulus) and CTE changes
Other physical property measurements
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Typically as a function of temperature and time
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Young’s modulus, tensile, elongation, durometer
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Change
