A third method involves measuring tgel over a range of
temperatures and then plotting tgel
21/2 against the setting temperature.
The infinite tgel extrapolation method1 of Tgel determination
assumes, empirically, that tgel;T2. From this
model we know that as tgel!`, tgel
21/2!0. Thus, the maximum
gelation temperature, Tgel , is the T intercept of the
tgel
21/2 versus T plot. This method has the advantage of giving
consistent values for the concentration dependent Tgel , but
has no theoretical basis.