笼形八乙烯基硅倍半氧烷／ABS复合材料的热性能和阻燃性

通过螺杆挤出成型法制备了笼形八乙烯基硅倍半氧烷(OVP)/ABS复合材料,采用TGA、氧指数仪和锥形量热仪研究OVP的加入对复合材料热性能和阻燃性能的影响。研究结果表明,在添加引发剂(DCP)的条件下,当乙烯基OVP含量为6.25%时,复合材料的初始分解温度由纯ABS的174℃上升到209℃;氧指数由纯ABS的17.8%上升到的21.4%;热释放速率峰值降为529 kW/m2,比纯ABS降低了近30%。采用SEM对燃烧过后的残炭进行了分析,并探讨了其阻燃机理。

Flame Retardancy and Thermal Properties of Octavinyl-Polyhedral Oligomeric Silsesquioxane/ABS Composites

A series of octavinyl-polyhedral oligomeric silsesquioxane(OVP)/ABS hybrid composites were prepared by the screwextruter,TGA measurements reveal that the addition of OVP with initiator to ABS improve the thermal properties of ABS.The oxygen index and heat release rates(HRR) of OVP/ABS composites were measured. The results show OVP can increase the oxygen index,and reduce the peak of heat release rate.Through SEM,the char of OVP/ABS combustion was analyzed.The results demonstrate that OVP can help ABS to increase the quality of char.