Abstract
The reaction of melamine with ammonium dihydrogenphosphate has been investigated by solid-state NMR spectroscopy under different conditions. Synthesized melamine diphosphate (MDP) was characterized by X-ray powder diffraction, solid-state NMR spectroscopy and was also tested for flame retardant ability. The flammability of polypropylene (PP) containing melamine diphosphate, pentaerythritol (PER) or dipentaerythritol (DPER) was characterized by limiting oxygen index (LOI).
