Cone calorimeter heat release rate curves

A simplified model of ignition and burning of polymers which docs not require one to work with partial differential equations has been proposed by Rychly [49]. It was applied to the combustion carried out in a mass loss cone calorimeter system [50]. A series of simulations of heat release rate curves was performed for polymers with intumescent additives [51]. The model was also used for the prediction of limiting oxygen index (LOI) [52],... 

Figure 15.11 Comparison of heat release rate curves and average rate (a) heat emission curves (b) for epoxy/IM-7, epoxy/IM-7/SWCNP, epoxy/IM-7/MWCNP, and epoxy/IM-7/CNFP. (Reprinted with permission from Wu etal. Copyright 2010 Elsevier Ltd.) (c) Original specimens for cone calorimeter test, (d) Schematic of the CNS-8 laminate, (e) Heat release rate of CNS-0, CNS-1, and CNS-8 laminates.

In order to predict the behavior of flame-retarded materials they are investigated using a cone calorimeter. A typical value found for the heat release rate of polyethylene is about 2200 kWm". Figure 23 shows the development of the heat release rate of the LDH polyethylene nanocomposites found by Costa. The curves indicate a dramatic reduction of the peak heat release rate (PHRR) and at the same time an inaease in the time of burning as the curves get flat and... 

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