摘要
通过极限氧指数(LOI)、力学性能测试、热重分析(TGA)和扫描电镜(SEM)分析表征手段,研究了磷酸酯(PX-220)及其与蒙脱土(MMT)协效阻燃对rPET/PC合金材料的阻燃性能和力学性能的影响。结果表明,单独添加15%PX-220后,阻燃材料的氧指数达到27%;将2%MMT与15%PX-220并用,阻燃合金材料的氧指数提高到29%,但力学性能下降明显。TG分析表明,PX-220与MMT共同作用使阻燃材料的起始分解温度比未加入阻燃剂rPET/PC合金材料的降低,在失重约20%后阻燃材料的热失重速率减小,最终残炭量增加。SEM显示炭层更加完整、致密地覆盖了整个燃烧表面。
The effect of phosphate ester（PX-220） and its flame retardant synergism with Montmorillonite （MMT） on the flame-re- tardant properties and mechanical properties of recycled PET（rPET） and PC alloys was investigated by means of limiting oxygen index, mechanical properties testing, thermo-gravimetie analysis and scanning electron microscopic observation. The results showed that adding only 15% phosphate ester into the rPET/PC alloy, the oxygen index was up to 27%, and its oxygen index further increased to 29% when 2% MMT and 15% PX-220 was simultaneously used to fill rPET/PC alloy. However,there was an：obvious decrease in mechani- cal properties. The thermo-gravimetic analysis indicated that the initial decomposition temperature of flame retardant materials modified with PX - 220 and MMT together was lower than that of rPET/PC alloy without flame retardants, and that the thermal weight loss rate reduced after thermal weight loss was about 20% and the final char residue increased significantly. SEM images displayed that char residue layer was more integrated and dense to cover the burning surface of flame retarded material.
出处
《西华大学学报（自然科学版）》
CAS
2013年第1期67-72,共6页
Journal of Xihua University:Natural Science Edition
基金
四川省教育厅重点项目(09ZA108)
关键词
磷酸酯
蒙脱土
rPET
PC合金
阻燃
phosphate ester
montmorillonite
recycled PET and PC alloy
flame retardant
