Measured Data

Specific Heat

Experiments for specific heat [J/(kg K)], or heat capacity, were conducted using a heat flow meter on unconditioned and dried samples at 10 °C, 20 °C, 30 °C and 40 °C.

Unconditioned

Temperature (C) Specific Heat Mean (J/kg-K) Standard Deviation (J/kg-K)
10.0 1732.0 523.0
20.0 1645.0 611.0
30.0 1676.0 562.0
40.0 1611.0 646.0

Thermal Conductivity

Experiments for thermal conductivity [k] were conducted using a heat flow meter on unconditioned and dried samples at 15 °C and 45 °C.

Unconditioned

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
15.0 0.018 0.001
65.0 0.022 0.002

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 which reduces the exposed surface area during cone calorimeter tests. An edge frame and wire grid were used to limit this behavior. A calcium silicate substrate was included beneath the samples. In addition, each sample was composed of five layers to provide enough mass for the sample to remain approximately uniformly distributed after shriveling and melting. A representative test picture and post-test picture 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. An edge frame and wire grid were used to limit this behavior. A calcium silicate substrate was included beneath the samples. In addition, each sample was composed of five layers to provide enough mass for the sample to remain approximately uniformly distributed after shriveling and melting. A representative test picture and post-test picture are available at the link above to Download raw data.

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.

This material shrivels and melts under thermal exposure which reduces the exposed surface area during cone calorimeter tests. An edge frame and wire grid were used to limit this behavior. A calcium silicate substrate was included beneath the samples. In addition, each sample was composed of five layers to provide enough mass for the sample to remain approximately uniformly distributed after shriveling and melting. A representative test picture and post-test picture are available at the link above to Download raw data.

Incident Heat Flux [kW/m²] Mean CO Yield [g/g] CO Yield Std. Dev. [g/g]
25 0.029 0.0
50 0.034 0.004
75 0.052 0.007

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.

This material shrivels and melts under thermal exposure which reduces the exposed surface area during cone calorimeter tests. An edge frame and wire grid were used to limit this behavior. A calcium silicate substrate was included beneath the samples. In addition, each sample was composed of five layers to provide enough mass for the sample to remain approximately uniformly distributed after shriveling and melting. A representative test picture and post-test picture are available at the link above to Download raw data.

Incident Heat Flux [kW/m²] Mean Soot Yield [g/g] Soot Yield Std. Dev. [g/g]
25 0.046 0.001
50 0.039 0.002
75 0.026 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.

Cone Calorimeter Test Notes:
This material shrivels and melts under thermal exposure which reduces the exposed surface area during cone calorimeter tests. An edge frame and wire grid were used to limit this behavior. A calcium silicate substrate was included beneath the samples. In addition, each sample was composed of five layers to provide enough mass for the sample to remain approximately uniformly distributed after shriveling and melting. A representative test picture and post-test picture are available at the link above to Download raw data.

Micro-scale Combustion Calorimeter

Value R1 R2 R3 Mean Std. Dev.
Heat of Combustion (MJ/kg) 17.12 19.03 17.81 17.99 0.79

Cone Calorimeter

Incident Heat Flux [kW/m²] Mean Effective Heat of Combustion [MJ/kg] Effective Heat of Combustion Std. Dev. [MJ/kg]
25 18.7 1.0
50 19.7 0.3
75 18.8 1.2

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) 258.3 0.3
Temperature at Onset of Melting (C) 225.9 2.1
Enthalpy of Melting (J/g) 54.3 2.6

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 0.850 0.003
800.0 0.844 0.003
1000.0 0.832 0.004
1200.0 0.820 0.006
1400.0 0.808 0.007
1600.0 0.798 0.009
1800.0 0.789 0.011
2000.0 0.782 0.012