Amorphous calcium carbonate (ACC) is the amorphous and least stable polymorph of calcium carbonate. ACC is extremely unstable under normal conditions and is found for example in sea urchins and corals. The inﬂuence of ACC on the outstanding macromechanical properties of Echinoderm calcite is unknown. In this paper Thermal Analysis methods were used to investigate the thermal stability of sea urchin spines.
Sealing elements undergo continuous changes in operating and environmental conditions. They are subject to natural, thermo-oxidative or mechanical aging processes and must be replaced after a certain time.
Billions of pounds of carpets are generated annually worldwide. A large percentage of which ends up in landfills is problematic because nylon is non-biodegradable.
Limitations in landfill capacity and the environmental impact of disposing of carpet waste in this manner have made recovering nylon from carpet waste an increasingly important enterprise.
Investigation of the fire retardant properties of polyurethane foams by means of simultaneous thermal analysis and evolved gas analysis. With this investigation, we were able to prove that the polyurethane accoustic foams were not flame retardant and did not comply with fire safety regulations.