School of Civil Engineering

OTH11

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Material description

Material ID: OTH11

Material type: Glass reinforced polyester composite.

Polymer: Polyester (74%)

Additives (fire retardants, fillers or traces of inorganic elements): Calcium (13%), Silicon (9%), Aluminium (3%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Polyester (PET)74
Calcium (Ca)13
Silicon (Si)9
Aluminium (Al)3
Traces of titanium (Ti)<1
Traces of iron (Fe)<1
Traces of strontium (Sr)<1
Traces of magnesium (Mg)<1
Traces of sodium (Na)<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
Polyester (PET)
...
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 (%)
Ca13
Si9
Al3
Ti<1
Fe<1
Sr<1
Mg<1
Na<1
K<1
Sc<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)0.17
Oxidative (air)0.18
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13929.78 x 10-3
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13659.96 x 10-3
Peak 25112.02 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 .