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Article Dans Une Revue Polymers for Advanced Technologies Année : 2011

Influence of Physical Properties on Polymer Flammability in the Cone Calorimeter

Parina Patel
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  • PersonId : 911190
Anna A Stec
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  • PersonId : 911192
Richard E Lyon
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  • PersonId : 911193

Résumé

The relationship between physical properties and fire performance as measured in the cone calorimeter is not well understood. ThermaKin, a one-dimensional pyrolysis model, has been used to predict the burning behaviour from the range of thermal, chemical and optical properties of various polymers exposed to a uniform heat flux, such as in a cone calorimeter. ThermaKin uses these material properties to predict the mass flux history in a cone calorimeter. Multiplying the mass flux history by the heat of combustion of the fuel gases gives the HRR history and these have been calculated for cone calorimeter experiments at 50 kW m-2 incident heat flux for the lowest, average and highest values of physical parameters exhibited by common polymers. In contrast with actual experiments in fire retardancy, where several parameters change on incorporation of an additive, this study allows for the effect of each parameter to be seen in isolation. The parameters used in this study are grouped into physical properties (density, heat capacity and thermal conductivity), optical properties (absorption and reflectivity), and chemical properties (heat of decomposition, kinetic parameter and heat of combustion). The study shows how the thermal decomposition kinetic parameters effect the surface burning (pyrolysis) temperature and resulting heat release rate history, as well as the relative importance of other properties directly related to the chemical composition. It also illustrates the effect of thermal inertia (the product of density, heat capacity and thermal conductivity) and of the samples' ability to absorb radiant heat.

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Dates et versions

hal-00627544 , version 1 (29-09-2011)

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Parina Patel, Terence Richard Hull, Anna A Stec, Richard E Lyon. Influence of Physical Properties on Polymer Flammability in the Cone Calorimeter. Polymers for Advanced Technologies, 2011, 22 (7), pp.1100. ⟨10.1002/pat.1943⟩. ⟨hal-00627544⟩

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