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Materiale Plastice (Mater. Plast.), Year 2003, Volume 40, Issue 3,



Stelian Vlad

Effects of Flame-Retardants on Thermal and Mechanical Behavior of Some Thermoplastic Polyurethanes


Abstract:
In this study were investigated the thermal and mechanical behavior of some polyurethane ignites by addition with nonreactive flame-retardants. Some flame-retardants, such as the compounds containing halogen, give toxic and corrosive fumes during combustion. To prevent these problems, non-halogenated flame-retardants, such as phosphorus-containing compounds, are materials of choice. The polyurethane elastomers were prepared using dibenzyldiisocyanate (DBDI) as isocyanate, poly(ethylene-adipate)diol (PEA) as polyol, diethylehe glycol (DEG), hexanediol (HD) or 1,4-butanediol (BD) as chain extenders, and different amounts of tris(1,3-dichloro-propyl-phosphat) (TDP). In some cases, to be improved the flame resistance was used small amounts of antimony trioxide (Sb2O3), which act as a “synergistic effect”. The polyurethane ignites were characterized by thermogravimetric analysis (TGA), elemental analysis and stress-strain measurements which were performed on a TIRAtest 2161 apparatus (Germany), equipped with a 100N cell and an extension rate of 10 mm/min. The hardness measurements were effectuated on disc with an apparatus standardized in grade Shore A (oSh A).


Keywords:
mechanical behavior;polyurethane;flame-retardants

Issue: 2003 Volume 40, Issue 3
Pages:
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This article is published under the Creative Commons Attribution 4.0 International License


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