【作者】 宋琴； 李向梅； 张文超； 杨荣杰；

【Author】 LI Xiangmei,SONG Qin,ZHANG Wenchao,YANG Rongjie(National Laboratory of Flame Retardant Materials,Engineering Research Center of Fire-Safe Materials and Technology,Ministry of Education,Beijing Institute of Technology,Beijing 100081)

【机构】 北京理工大学材料学院,阻燃材料研究国家专业实验室,火安全材料与技术教育部工程研究中心；

【摘要】 通过熔融共聚法制备了含蒙脱土(MMT)和磷酸锆的PC-PDMS纳米复合物,通过热重分析(TGA)和X-射线衍射仪(XRD)对其热稳定性和结晶形态进行了研究,发现MMT和磷酸锆分别形成了部分插层和剥离的结构,但它们降低了PC-PDMS的热稳定性。将合成的PC-PDMS纳米复合物与PC在双螺杆挤出机上熔融共混,纳米复合物并未改变PC的降解路径,对PC的极限氧指数影响不大,UL-94燃烧等级为V-2级,但缩短了燃烧时间;锥形量热仪结果显示PC-PDMS纳米复合物降低了PC的热释放速率,使形成的炭层加固致密;加入MMT的PC-PDMS纳米复合物缩短了PC的燃烧时间,但加入磷酸锆的PC-PDMS纳米复合物则延长了PC的点燃时间。更多还原

【Abstract】 PC-1%PDMS-montmorillonite(MMT)(or zirconium phosphate) nanocomposite have been synthesized by the situ polymerization reaction of PC-1%PDMS copolymer and MMT(or zirconium phosphate),and compared its properties with the PC blends with adding by twin screw extruder.Using TG,limit the oxygen index(LOI),UL94 vertical combustion and the cone calorimeter(CONE) to study the burning performance of the PC/PC-PDMS-MMT(or zirconium phosphate) composite system and PC/PC-PDMS/montmorillonite(or zirconium phosphate) blends.At the same time,the surface morphology and structure of the carbon layer of the two systems have been studied by the SEM.PC-1%PDMS nanocomposites have not changed the decomposition path of PC,and a little influence on limited oxygen index and shorted combustion time.PC-1%PDMS nanocomposites have decreased the heat release rate of PC,and form the rigid and compact char.更多还原