聚苯醚与膨胀型阻燃剂协同阻燃聚苯乙烯的研究

Study on polystyrene synergistically flame retarded by polyphenylene oxide and intumescent flame retardant

聚苯醚(PPO)和含P-N膨胀型阻燃(IFR)复配使用,实现了聚苯乙烯(PS)的阻燃。通过X射线衍射、热重分析和极限氧指数分析和表征IFR/PPO/PS复合材料的断面形貌,热稳定性和阻燃性能。并通过对数据的分析,讨论了PPO和IFR对PS炭化和阻燃性能的影响。结果表明,PPO和IFR的结合可以有效地提高复合材料的阻燃性能。添加20%的PPO和40%的IFR就可以使极限氧指数达到30.2%,并明显提高了成炭性能。此外,碳质泡沫层,隔热效果、阻燃和抑烟效果都比较好。通过一系列的数据分析可以发现PPO和IFR的组合表现出协同阻燃作用。

Polystyrene（PS） is widely used in automotive parts, packaging materials, toys, building materials, electri- cal equipment,household supplies and so orL While the inflammability restricted its application to some extent. Polypheny- lene oxide（PPO） and P-N containing intumescent flame retardant（IFR） were used in combination to achieve the purpose of fire retardancy of PS. X-ray diffraction（XRD）, thermo gravimetric analysis（TGA） and limiting oxygen index（LOI） were used to analyze and characterize IFR/PPO/PS composites in terms of the sample structure, section morphology, thermal stability and the flame retardant performance. And through the analysis of the data, the effects of PPO and IFR on PS charring and flame retardaney were discussed. The results showed that the combination of PPO and IFR could effectively improve the fire retardant performance of composites. Limiting oxygen index reached 30. 2% for PS with the addition of 40 %0 of IFR and 20 % of PPO, and the formation of charring layer was promoted significantly. Furthermore, carbonaceous foam layer had good thermal insulation, fire retardant and smoke suppression effects. So the combination of PPO and IFR showed a synergistic flame retardant effect.