Dependence of the thermomechanical glass transition temperature of chalcogenide glasses on the heating rate

Using statistical poloymer physics, the authors show that, for any polymeric system of molecular chains which have flexibility and intermolecular interactions, there must be a critical temperature T/sub 2/ at which the conformation entropy goes to zero, and a nondegenerate configuration with the lowest free energy corresponding to the ''ground state'' of an amorphous polymer must be found for the system. As a result of the thermomechanical measurements the authors have made on chalcogenide glasses, it is shown that the relationship 1/T /SUB g/ = C/sub 1/ -C/sub 2/ log q can be used to describe the behavior of the thermonuclear glass-transition temperature only over a quite narrow interval of heating rates.

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