Intrinsically Noncombustible Thermosets from Sulfur-Containing Epoxy Resin and Benzoxazines: Evaluation of Thermal and Mechanical Properties

Table 4

Date of cone calorimeter for copolymers (LOI = 27).

	TTI/s	PHRR (kW·m^−2)	THR (MJ·m^−2)	MARHE (kW·m^2)	TSR (m^2·m^−2)	TSP (m^2)
Poly(TBP-a/EPS)	25	1415	61.7	482	1,145	10.2
Poly(TBP-fa/EPS)	33	902	43.9	390	1,101	9.8
Poly(TBP-tma/EPS)	31	1,029	66.2	458	1,227	11.0

TBP, 4,4’-thiobisphenol; EPS, epoxy resin; TTI, time to ignition; LOI, limiting oxygen index; THR, total heat release; MARHE, maximum average heat release rate; TSP, total smoke production; TSR, the smoke release rate.