[blackcat]

Do thermoset polymers have glass transition temperature (Tg)?

[mjc123]

Yes. It depends on the degree of crosslinking, so you might not be able to find definitive values in the literature.

[Enthalpy]

As you'll soon be fluent in German, and °C reads the same in many languages anyway, I suggest you to find, buy, let your employer buy, buy used, borrow, inherit, get somehow:
Kunststoff Tabellen, by Bodo Carlowitz
It's expensive (89€). Here in Germany, an engineer can deduce half the price from his income tax. Keep the receipt.