CMSs对新型聚丙烯膨胀阻燃体系性能的影响

发布时间：2018-05-25 21:09

本文选题：碳微球 + 壳聚糖　；参考：《塑料工业》2017年09期

【摘要】：为了进一步提高聚丙烯(PP)膨胀阻燃体系的阻燃性能,将碳微球(CMSs)添加至膨胀型阻燃聚丙烯(壳聚糖/聚磷酸铵/聚丙烯(CS/APP/PP))体系中,经熔融共混的方法制备出CMSs/CS/APP/PP复合材料。采用数显氧指数仪(LOI)、锥形量热仪(CONE)、电子万能试验机(EUT)等仪器对复合材料进行了测试,同时考察了CMSs对聚丙烯膨胀阻燃体系(CS/APP/PP)阻燃性能的影响。结果表明,CMSs的加入可提高材料的阻燃性;在CMSs添加量为3%时,复合材料的极限氧指数达到31.5%,较CS/APP/PP体系提高了18.9%;热释放速率峰值(PHRR)、平均热释放速率(MHRR)、平均有效燃烧热(MEHC)、总热释放量(THR)均明显降低,成炭率显著提高,炭层更加致密,火灾性能指数(FPI)达到最大,为0.089 3 m~2·s/kW,较CS/APP/PP体系提高了1倍多,材料的阻燃性大幅度提升。同时CMSs的加入显著提高了复合材料的抑烟性,使复合材料的总烟释放量(TSR)、CO和CO_2的排放均明显降低;且复合材料的火灾蔓延指数(FGI)显著减小,为1.16 kW/(m~2·s),较CS/APP/PP体系降低了29.9%,火灾危险性明显降低。
[Abstract]:In order to further improve the flame retardancy of PP / PP, CMSs/CS/APP/PP composites were prepared by melt blending of carbon microspheres (CMSs) into intumescent flame retardant polypropylene (chitosan / ammonium polyphosphate / PP / PP / PP / PP / PP / PP / PP) system. The composites were tested by means of digital oxygen index, cone calorimeter, electronic universal testing machine and so on. The effect of CMSs on the flame retardancy of PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP system was also investigated. The results showed that the addition of CMSs could improve the flame retardancy of the material, and when the amount of CMSs was 3, The limit oxygen index of the composite is 31.5, which is 18.9 higher than that of the CS/APP/PP system, and the peak heat release rate, the average thermal release rate, the average effective combustion heat and the total heat release amount are all significantly decreased, the carbonization rate is significantly increased, and the carbon layer is more compact. The fire performance index (FPI) is the highest, which is 0.089 3 mm2 / kW, which is more than twice as high as that of CS/APP/PP system, and the flame retardancy of the material is greatly improved. At the same time, the addition of CMSs significantly increased the smoke inhibition of the composites, and decreased the total smoke emission and the emission of CO and CO_2, and the fire spread index (FGI) of the composites decreased significantly. Compared with the CS/APP/PP system, the fire risk was significantly lower than that of the CS/APP/PP system, with a decrease of 29. 9%.
【作者单位】：太原理工大学新材料界面科学与工程教育部重点实验室;太原理工大学轻纺工程学院;
【基金】：国家自然科学基金(编号:51302183) 山西省自然科学(青年)基金(编号:2012021021-6)
【分类号】：TB33;TQ325.14

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