Measured Data

Thermal Conductivity

Experiments for thermal conductivity [W/(m K)] were conducted using a heat flow meter on unconditioned and dried samples at 15 °C and either 45 °C or 65 °C.

Unconditioned

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
30.0 0.037 0.001
40.0 0.040 0.000
50.0 0.042 NaN

Mass Loss Rate (MLR)

Initial-mass-normalized mass loss rate [1/s] was measured in the simultaneous thermal analyzer experiments at three heating rates: 3 K/min, 10 K/min, and 30 K/min and mass loss rate [g/s] in the cone calorimeter at three heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

Cone Calorimeter Test Notes:
This material shrivels and melts under thermal exposure. Near the end of each cone calorimeter test the opposing corners of the foil pan would lift upwards causing the foil pan to partially fold along the diagonal. Since this behavior generally occurred so near the end of the tests, no preventative sample preparation was used. However, additional replicates using some form of restraints (i.e. tie wires) may be necessary to supplement this data set. Representative test pictures are available at the link above to Download raw data.

Simultaneous Thermal Analyzer

Cone Calorimeter: 25 kW/m2

Cone Calorimeter: 50 kW/m2

Cone Calorimeter: 75 kW/m2

Heat Release Rate Per Unit Area (HRRPUA)

Experiments for heat release per unit area [kW/m2] were conducted on samples conditioned at 20°C and 50% relative humidity using a cone calorimeter at three different heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material shrivels and melts under thermal exposure which reduces the exposed surface area during cone calorimeter tests. Prior to ignition, shrivelling of the sample caused contact with the spark ignitor, creating spikes in the mass time history data and likely affecting time to ignition.

Cone Calorimeter: 25 kW/m2

Cone Calorimeter: 50 kW/m2

Cone Calorimeter: 75 kW/m2

Carbon Monoxide (CO) Yield

Carbon monoxide yield was measured during cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

Incident Heat Flux [kW/m²] Mean CO Yield [g/g] CO Yield Std. Dev. [g/g]
25 0.022 0.006
50 0.018 0.002
75 0.018 0.006

Specific Heat Release Rate

Experiments for specific heat release rate [W/g], were conducted using a micro-scale combustion calorimeter at a heating rate of 30 K/min.

Derived Data

Soot Yield

Soot yield [g/g] was calculated from smoke obscuration data collected in cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

Incident Heat Flux [kW/m²] Mean Soot Yield [g/g] Soot Yield Std. Dev. [g/g]
25 0.06 0.009
50 0.053 0.002
75 0.06 0.005

Effective Heat of Combustion (Δhc)

Effective heat of combustion [MJ/kg] is calculated from data collected in both micro-scale combustion calorimeter experiments and cone calorimeter experiments.

Micro-scale Combustion Calorimeter

Value R1 R2 R3 Mean Std. Dev.
Heat of Combustion (MJ/kg) 18.39 18.65 18.28 18.44 0.16

Cone Calorimeter

Incident Heat Flux [kW/m²] Mean Effective Heat of Combustion [MJ/kg] Effective Heat of Combustion Std. Dev. [MJ/kg]
25 29.4 8.7
50 19.0 1.1
75 16.1 3.5

Melting Temperature and Enthalpy of Melting

Melting temperature [Tmelt] and the enthalpy of melting [kJ/kg] were derived quantities computed from data collected in simultaneous thermal analyzer experiments.

Value Mean Std. Dev.
Peak Melting Temperature (C) 256.6 1.4
Temperature at Onset of Melting (C) 233.2 6.4
Enthalpy of Melting (J/g) 40.5 3.5

Band Averaged Emissivity

Band averaged emissivity was calculated from reflectance measurements conducted with an integrating sphere and Fourier transform infrared spectrometer.

Source Temperature [K] Emissivity Std. Dev.
600.0 0.717 0.005
800.0 0.646 0.006
1000.0 0.582 0.009
1200.0 0.528 0.013
1400.0 0.484 0.017
1600.0 0.449 0.021
1800.0 0.422 0.025
2000.0 0.401 0.028