Alkyl sulfone bridged phosphorus flame-retardants for polypropylene
| Autor: | Sandro Lehner, Milijana Jovic, Noemie Ott, Rudolf Hufenus, Patrick Rupper, Ali Gooneie, Rashid Nazir, Sabyasachi Gaan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
02 engineering and technology Phosphinate 010402 general chemistry 01 natural sciences Sulfone Flame retardant chemistry.chemical_compound Polymer chemistry lcsh:TA401-492 General Materials Science Thermal stability Thermal analysis Alkyl Phosphine oxide chemistry.chemical_classification Mechanical Engineering Bridged sulfone Alkyl sulfone Phosphorus 021001 nanoscience & nanotechnology Diphenylphosphine oxide Phosphonate 0104 chemical sciences chemistry Mechanics of Materials lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Polypropylene Sulfur |
| Zdroj: | Materials & Design, Vol 200, Iss, Pp 109459-(2021) |
| ISSN: | 0264-1275 |
| Popis: | Three novel alkyl sulfone bridged phosphorus (P) compounds namely 6,6′-(sulfonylbis(ethane-2,1-diyl))bis(dibenzo[c,e][1,2]oxaphosphinine 6-oxide) (SEDOPO), sulfonylbis(ethane-2,1-diyl))bis(diphenylphosphine oxide) (SEDPPO), and tetraphenyl (sulfonyl bis(ethane-2,1-diyl)) bis(phosphonate) (SEDPP) (i.e. phosphine oxide, phosphinate and phosphonate, respectively) were synthesized via a Michael addition reaction with good yields (≥ 85%) at a 200-g scale. They exhibited thermal stability above 250 °C, which allowed them to be melt-processed with polypropylene (PP) and formed into thin films (~ 0.6 mm). Rheological measurements of the PP blends exhibited a typical shear thinning behavior and provided evidence for the synthesized compound's thermo-oxidative stabilizing effect. This was also confirmed by thermal analysis showing that the thermo-oxidative stability of PP-SEDOPO and PP-SEDPPO blends was higher (~25 °C) than the blank PP; however, PP-SEDPP had a smaller impact. Small scale fire tests of the PP-FR blends confirmed the flame retardant efficacy of the new P-compounds. Cone calorimetry on PP-SEDOPO blends showed a reduction in the heat release rate (HRR) (~48%) compared to blank PP. Further thermal and evolved gas analysis of the PP blends confirmed that the new P-compounds are primarily active in the gas-phase. |
| Databáze: | OpenAIRE |
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