Phosphorus Flame Retardants for Polymeric Materials from Gallic Acid and Other Naturally Occurring Multihydroxybenzoic Acids

Table 5

Thermal decomposition of phosphorus esters of methyl 3,5-dihydroxybenzoate.

Compound	Temperature of decomposition onset (°C)^a		Temperature of maximum decomposition rate (°C)	Decomposition residue (%)^b
	Nitrogen	Air	Nitrogen	Nitrogen	Air
35DHB-DEP	224	224	272	5	<1
35DHB-DPP	328	303	366	<1	5
35DHB-DOPO	332	319	393	22	<1

^aExtrapolated onset temperature from the derivative plot of mass loss versus temperature. ^bPercentage of the initial sample mass.