Highly effective flame retarded polystyrene by synergistic effects between expandable graphite and aluminum hypophosphite
Autor: | Zong-Min Zhu, Yu-Zhong Wang, A-Hui Kang, Wang Liao, Wen-Hui Rao |
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Rok vydání: | 2018 |
Předmět: |
Materials science
Polymers and Plastics Hypophosphite chemistry.chemical_element 02 engineering and technology Calorimetry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combustion 01 natural sciences 0104 chemical sciences Limiting oxygen index chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Mechanics of Materials Aluminium Materials Chemistry Graphite Polystyrene 0210 nano-technology Nuclear chemistry |
Zdroj: | Polymer Degradation and Stability. 154:1-9 |
ISSN: | 0141-3910 |
Popis: | Herein, expandable graphite (EG) and aluminum hypophosphite (AP) are used to prepare flame-retardant polystyrene (PS) composites. The flame-retardant properties of the PS composites are investigated by the limiting oxygen index (LOI) test, vertical burning test (UL-94) and cone calorimetry test (CC). With 15 wt% EG or AP incorporated alone, the PS composites show limited improvement in LOI, and fail to pass the UL-94 test. In contrast, with 10 wt% EG and 5 wt% AP added, the sample (PS/10EG/5EG) passes the UL-94 V-0 rating, and its LOI value increases from 17% to 25.5%. CC results show that the PS/10EG/5AP has a significantly depressed peak heat release rate (PHRR) by 77.7%, total heat release (THR) by 39.3%, smoke product rate (SPR) by 78.2% and total smoke product (TSP) by 82.3%. Meanwhile, the flame-retardant mechanism of the PS composites is studied by SEM, XPS, TG-IR and Py-GC/MS, and the results of which indicating a combination of condensed-phase and gaseous-phase activity during combustion. |
Databáze: | OpenAIRE |
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