Catalysis

Polymer chemistry

Materials science

Reaction mechanism

Ammonia

Phosphate

Ammonium

Ammonium polyphosphate

Polymer

Organic chemistry

Polyphosphate

Chemistry

Fire retardant

Intumescent

Polymer science

Pentaerythritol

Polymer Degradation and Stability

Experimental evidence is given of the formation of a phosphate ester as the first step in the heat-induced reaction between ammonium polyphosphate and pentaerythritol. The reaction takes place with elimination of ammonia and water and disruption of the chain structure of the polyphosphate

Study of the mechanism of intumescence in fire retardant polymers: Part IV—Evidence of ester formation in ammonium polyphosphate-pentaerythritol mixtures