无机粒子复配聚磷酸铵对硅橡胶性能的影响  

Effects of Inorganic Particle and Ammonium Polyphosphate Compound on Properties of Silicone Rubber

作　　者：罗远芳[1] 丁勇 薛锋[1] 贾志欣[1] 陈勇军[1] 贾德民[1] LUO Yuan-fang ,DING Yong ,XUE Feng ,JIA Zhi-xin CHEN Yong-jun JIA De-min(School of Materials Science and Engineering,South China University of Technology,Guangzhou 540640,Guangdong,Chin)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2017年第11期63-70,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省科技计划项目(2014A010105017)~~

摘　　要：为研究不同形貌结构的无机粒子复配聚磷酸铵对硅橡胶阻燃性能和机械性能的影响,分别将经偶联剂表面处理后的针状的硅灰石(WS)、中空管状的埃洛石(HNTs)、片层状的磷酸锆(α-ZrP)与聚磷酸铵加入硅橡胶基体中,通过机械共混制备了阻燃硅橡胶复合材料(FRSR).利用SEM、TEM和激光粒度分析仪对3种无机粒子的形貌结构、粒径分布及在FRSR中的分散性进行了表征,采用万能试验机、热失重分析仪、垂直燃烧仪、极限氧指数仪等对FRSR的机械性能、热稳定性和阻燃性能进行了研究.结果表明:3种无机粒子在FRSR中均能保持初始形貌,在基体中能较好地分散;当无机粒子与聚磷酸铵复配物的添加量为25 phr时,填充1 phr改性HNTs的FRSR拥有更高的机械性能(拉伸强度为8.8 MPa,断裂伸长率为218.6%),填充1 phr改性α-ZrP的FRSR的阻燃性能和热稳定性最好(极限氧指数为32.3,垂直燃烧级别为V-0,起始分解温度为312.9℃).文中还采用SEM对FRSR燃烧后的碳渣进行了分析,并对残渣形成机制进行了初步探讨.In order to investigate the effects of the inorganic particle and ammonium polyphosphate（ APP） compound of different morphologies on the flame retardancy and mechanical properties of silicone rubber,acicular wollastonite（ WS）,tubular halloysite（ HNTs） and layered α-zirconium phosphate（ α-ZrP）,which were modified by a coupling agent,were selected to incorporate into silicone rubber together with APP to prepare the flame retardant silicone rubber composite（ FRSR） through a mechanical blending process. Then,the morphology structure and particle size distribution of inorganic particles and their dispersity in the FRSR were characterized by using a SEM,a TEM and a laser particle size analyzer,and the mechanical property,thermal stability and flame retardancy of the FRSR were systematically investigated with the help of TGA,the vertical burning test（ UL-94） and the limit oxygen index（ LOI）. The results show that the three kinds of inorganic particles are dispersed well in the FRSR matrix as their original geometrical shape,and that,when the content of the inorganic particle and APP compound is 25 phr,the FRSR incorporated with 1 phr OHNTs is of higher mechanical property（ specifically,the tensile strength and the elongation at break are 8. 8 MPa and 218. 6%,respectively）,and the FRSR incorporated with 1 phr α-OZrP is of the best thermal stability and flame retardancy（ specifically,the limiting oxygen index,the UL-94 level,and the initial decomposition temperature are respectively 32. 3,V-0 and 312. 9 ℃）. Besides,the residues of the FRSR were analyzed by a SEM,and the formation mechanism of the residue was preliminarily investigated.

关 键 词：硅橡胶 无机粒子 聚磷酸铵 阻燃性能 机械性能 

分 类 号：TQ333.93[化学工程—橡胶工业]