Does the molecular weight dependence of T _g correlate to M _e?

The nature of the molecular weight (MW) dependence of the glass transition temperature (T _.g) in polymers still remains a subject of discussion. Recently, Hintermeyer et al. [Macromolecules 2008, 41, 9335] proposed that the MW at which the dependence of T _g saturates corresponds to the molecular weight between entanglements, M _e. We demonstrate on the example of four polymers that there is no relationship between Me and saturation of the molecular weight dependence of T _g.