How to test the creep deformation of polymer

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Levy expresses enthusiasm for participating in the physics forum and seeks to share knowledge while learning from others. He mentions testing the creep deformation of PET (polyethylene terephthalate) and requests references on the subject. A participant suggests checking the literature and specifically points out ASTM D2990 as a relevant standard that may provide the needed methods for polyester cord testing.
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Dear all, I am Levy , I am glade to take part into physics Forums, I hope I can share my know with everybody and study from you, Thank You!

I test the PET of creep deformation recent days, who has some reference about this aspect.

Thank you
 
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Have you checked the literature?
 
Certainly, I have looked for some documents about the creep deformation, but no methods for the cord of polyester.
 
You missed ASTM D2990?
 
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