School of Civil Engineering

OTH08

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Material description

Material ID: OTH08

Material type: Polycarbonate honeycomb structure with an inorganic filler.

Polymer: Polycarbonate (82%)

Additives (fire retardants, fillers or traces of inorganic elements): Barium sulfate (17%), Titanium (1%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Polycarbonate (PC)82
Barium sulfate (BaSO4)17
Titanium (Ti)1
Traces of silicon (Si)<1
Traces of strontium (Sr)<1
Traces of calcium (Ca)<1
Traces of chromium (Cr)<1
Traces of chlorine (Cl)<1
Traces of potassium (K)<1

A. Material composition identification

A.1 Attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR)

Table 2. FTIR compound identification.
Identified Compounds
Polycarbonate (PC)
Barium sulfate (BaSO4)
...
Figure 1 . FTIR spectra: Absorbance percentage versus wavenumber from the sample.
...
Figure 2. FTIR spectra: Absorbance percentage versus wavenumber from the sample and the identified compounds.

A.2 Energy Dispersive X-Ray Fluorescence (EDXRF)

Table 2. Inorganic elements and their mass concentration identified with EDXRF.
ElementMass Concentration (%)
Ba13
Ti2
S2
Sr<1
Si<1
Ca<1
Cr<1
Cl<1
K<1
Mg<1
...
Figure 3. EDXRF spectra. Counts vs energy. Identified elements are shown as vertical lines.

B. Thermogravimetric analysis

Table 3. Mass fraction of residue after thermal decomposition.
ConditionFraction of mass residue at 800°C
Non-oxidative (nitrogen)0.28
Oxidative (air)0.06
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 15292.135 x 10-2
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 15081.581 x 10-2
Peak 25191.54 x 10-2
Peak 36443.4 x 10-3
...
Figure 4. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of nitrogen and a heating rate of 20°C min-1.
...
Figure 5. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of air and a heating rate of 20°C min-1 .