[jeffmoonchop]

Would you expect a 20% sucrose solution to have the same low temperature DSC Tg as a 10% sucrose solution?

I've read that they would be the same. We have a result with 20% at around -35C.

As far as my understanding goes sucrose superconcentrates when the ice freezes, creating pockets of supersaturated sucrose, which then turn to amorphous glass at around -35C. So would this in theory give the same Tg as 10% sucrose or 30% sucrose?

thanks

[Corribus]

If the glass transition is only a characteristic of the (pure-ish) sucrose containing regions, then my thought would be that the temperature would be the same regardless of the concentration, but the magnitude of the response would change.  However if the size of the supersaturated regions change as a function of concentration, there could be interfacial effects that make a difference.

That's just total speculation though.