The Glass Transition Temperature Depends on the Loading Rate

[@Benyamin_Gholami]

For a typical silicone material, how much would you expect Tg to shift w.r.t. loading rate?

[@PolymerFEM]

Hmm. I don't know, and it would take some time to dig up date for that. Can you test it experimentally?

[@Benyamin_Gholami]

@@PolymerFEM Thanks for your response. I have DMA data at 0.1Hz up to 10Hz, and I see several degrees change in Tg. I'm more interested to know how much Tg would shift at very low and very high freqs.

[@PolymerFEM]

@@Benyamin_Gholami I typically see about 5 deg C change with decade of frequency (or strain rate).

[@Benyamin_Gholami]

Very interesting Dr. How can we replicate this behavior of Tg with TMA test? Thanks.

[@PolymerFEM]

Yes, you can run temperature sweeps in your TMA machine at different frequencies to quantify this behavior for your specific materials.