Influence of physical properties on polymer flammability in the cone calorimeterReport as inadecuate






Author: Parina Patel, T Richard Hull, Anna A Stec and Richard E. Lyon

Source: https://core.ac.uk/

The relationship between physical properties and fire performance as measured in the cone calorimeter is not well understood. A number of studies have identified relationships between the physical and chemical properties of polymeric materials and their gasification behaviour which can be determined through numerical pyrolysis models. ThermaKin, a one-dimensional pyrolysis model, has recently been employed to predict the burning behaviour in fire calorimetry experiments. The range of thermal, chemical and optical properties of various polymers have been utilised to simulateud the processes occurring within a polymer 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 expe...


Teaser



This is the pre-peer reviewed version of the following article: Patel P, Hull T Richard, Stec Anna A, Lyon Richard E (2011) Influence of physical properties on polymer flammability in the cone calorimeter.
Polymers for Advanced Technologies 2011, which has been published in final form at http:--dx.doi.org-10.1002-pat.1943 Influence of Physical Properties on Polymer Flammability in the Cone Calorimeter a Parina Patela, T.
Richard Hull*a, Anna A.
Steca and Richard E.
Lyonb Centre for Fire and Hazards Science, School of Forensic and Investigative Science, University Of Central Lancashire, Preston, PR1 2HE, UK b Fire Safety, Federal Aviation Administration, William J.
Hughes Technical Centre, Atlantic City International Airport, NJ 08405, USA * trhull@uclan.ac.uk Abstract The relationship between physical properties and fire performance as measured in the cone calorimeter is not well understood.
A number of studies have identified relationships between the physical and chemical properties of polymeric materials and their gasification behaviour which can be determined through numerical pyrolysis models.
ThermaKin, a one-dimensional pyrolysis model, has recently been employed to predict the burning behaviour in fire calorimetry experiments.
The range of thermal, chemical and optical properties of various polymers have been utilised to simulate the processes occurring within a polymer 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 ....






Related documents