Specific heat relaxation during macromolecule growth

When dissimilar molecules in a liquid mixture react isothermally to form covalent bonds and linear chain macromolecules grow until the liquid vitrifies, the complex C-p of the mixture measured for a fixed frequency decreases. The real component of this C-p measured as a function of the number of covalent bonds formed, or macroscopic reaction time, shows a dispersionlike decrease and the imaginary component a peak. From these data, the evolution of structural relaxation time during the growth of the macromolecules has been determined and its formalism given.