  We have connected the dynamic fragility, namely the rapidity of the
relaxation time increase upon temperature reduction, to the excess entropy and
heat capacity of a large number of glass-forming polymers. The connection was
obtained in a natural way from the Adam-Gibbs equation, relating the structural
relaxation time to the configurational entropy. We find a clear correlation for
a group of polymers. For another group of polymers, for which this correlation
does not work, we emphasise the role of relaxation processes unrelated to the
&#61537; process in affecting macroscopic thermodynamic properties. Once an
essentially temperature independent contribution of these processes is removed
from the total excess entropy, the correlation between dynamic fragility and
thermodynamic properties is re-established.
