As an alternative to the currently used rheological methods
for determining Tgel , Fig. 2 shows tgel plotted against
setting temperature on logarithmic coordinates. Interestingly,
when the four lines are extrapolated they intersect at a temperature
of 33.660.5 °C. Since the concentration dependence
of tgel is due to the frequency of encounters between polymers,
the tendency of the four concentrations of gelatin to
converge at one temperature indicates that at that temperature,
the concentration of polymer is inconsequential. Such a
point would occur at a temperature where polymer–polymer
interactions are breaking and reforming at the same rate.