Characterization of Flame-retarded Polymer Combustion Chars by Solid-state ~13C and ~29Si NMR and EPR

摘要

We report here on the results of our continuing effort to study the flame-retardant mechanism of silica gel and potassium carbonate. These additives reduce the flammability of a wide variety of common polymers such as polypropylene, nylon, polymethylmethacrylate, poly(vinyl alcohol), and cellulose. In an effort to determine how these additives reduce polymer flammability, we have used electron paramagnetic resonance spectroscopy and solid-state ~13C and ~29Si nuclear magnetic resonance spectroscopy to characterize the combustion chars or residues.