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Polymer maximum "service" temperature

Joel_Lapointe

Mechanical
Joined
Dec 13, 2023
Messages
22
Location
US
I'm mechanical engineer, so the topic of material definition pertaining to polymers isn't my best.
I'm searching the maximum "service" temperature of a few polymers and elastomers on Campus plastics and Matweb.
Some compounds have a clear "service" temperature window other not. So my questions are:
  1. Is a fraction of the fusion temperature (1/3, 1/2 or 2/3...) a good estimation of maximal "service" temperature? If yes, is there a common knowledge among material engineers on that fraction?
  2. Is the deflexion temperature at 1.8MPa or 0.46MPa a commonly used limit for the maximal "service" temperature? If yes, is it a fraction of this temperature?
  3. Is there any other possible rules of the thumb or known relations between other properties to calculate a maximum "service" temperature?
Thank you,
 

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