“…Here, we assume that crosslink points and entanglement points have the same effect on T g ; this may overestimate the influence of entanglements but it provides an estimate of the magnitude of any T g depression that might be observed from changes in entanglement concentration. By choosing K 2 Z0.82 [41], we estimated that the T g change for a change in the molecular weight between entanglements (M c ) from the bulk value of 17,300 [42] to 34,600 g/mol, is only a 0.9 K decrease. We note that a change in M c of this magnitude would occur with an increase in J N of 100% on freeze-drying, which is greater than that observed in creep measurements [4].…”