Evaluating cross-link density in model polyurethane acrylate coatings with ~1H and ~(13)C NMR relaxation measurements

摘要

Polyurethane acrylate coatings have been widely used in a variety of technological applications, including as protective coatings for optical fiber. In order to understand the mechanical properties of these coatings, one must be able to correlate the polymer formulation and thus the chemical structure with network dynamics. One of the more promising approaches for this is through the use of nuclear magnetic resonance (NMR) techniques, which can be sensitive to the polymeric network structure and also the mobility of various constituents.