Mechanical, thermal and flammability properties of huntite hydromagnesite reinforced polyurethane elastomer

Güler, Türkan
Polyurethane elastomer (Thermoplastic Polyurethane-TPU) has desirable properties for many applications including footwear, packaging, protective coatings, cables, wires and tubes in the mainly automotive and construction industries. Huntite and Hydromagnesite are naturally occurring minerals that has been used as fire retardants commercially since the late 1980’s. The World’s largest reserve of this mineral has been found in Turkey. The main purpose of present work is to investigate the combustion and thermal degradation characteristics of the flame retardant TPU based composites containing huntite and hydromagnesite with and without expandable graphite. The combustion and the thermal degradation characteristics of composites are investigated by LOI, UL-94 standard, thermogravimetric analysis (TGA) and mass loss calorimeter. Char residues remained after mass loss calorimeter test are investigated by conducting attenuated total reflectance – Fourier-transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The mechanical properties of the composites are also investigated by tensile testing and dynamic mechanical analysis (DMA).


Sonat, Emine Evren; Özerinç, Sezer; Department of Mechanical Engineering (2021-12-10)
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Carburizing and subsequent quenching heat treatments are commonly used industrial processes to improve the properties and performance of steel shafts. Undesired dimensional and shape changes (distortion) related to these treatments are still the most frequent reason for expensive and time consuming corrective operations, low performance during service and even product rejection. The major aim of this study is to identify the suitable control parameters for subsequent optimization of the carburized quenching...
Citation Formats
T. Güler, “Mechanical, thermal and flammability properties of huntite hydromagnesite reinforced polyurethane elastomer,” M.S. - Master of Science, Middle East Technical University, 2017.