N. Pecoul et al., C-13, MG-25 AND B-11 SOLID-STATE NMR-STUDY OF A FIRE RETARDED ETHYLENE-VINYL ACETATE COPOLYMER, Macromolecular symposia, 119, 1997, pp. 309-315
Flame retardance of ethylene-vinyl acetate copolymer (EVA) can be achi
eved using magnesium hydroxide (Mg(OH)(2)) incorporated in the polymer
ic matrix. The adduct of small amount of zinc berate as synergistic ag
ent in the formulation increases the fire-proofing properties. Multinu
clei solid-state NMR appears as a powerful means to characterise mater
ials before and after combustion. We show that endothermic dehydration
, water vapour evolved and formation of a glassy coating provide the f
lame retardancy of interest to the polymeric matrix.