Abstract
The dynamics of hydrogen bond complex formation between functional groups which are attached to a polymer chain, is studied in the molten state. The concentration of complexes in the thermodynamic equilibrium is distorted by the application of a large oscillatory strain in the nonlinear viscoelastic regime. The relaxation back to the thermodynamic equilibrium is studied as a function of the temperature in the linear viscoelastic regime. From the mechanical response the kinetic analysis can be performed using a modified Doi-Edwards theory. Using the equilibrium constants obtained from IR-spectroscopy, the rate constants for complex formation and decomplexation are obtained. The temperature dependence is equivalent to the temperature dependence of the zero shear viscosity which implies that complex formation is a diffusion-controlled process.
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Stadler, R., de Lucca Freitas, L. Dynamics of hydrogen bond complexes in polymer melts. Colloid & Polymer Sci 266, 1102–1109 (1988). https://doi.org/10.1007/BF01414400
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DOI: https://doi.org/10.1007/BF01414400