磷腈类衍生物改性磷酸锆的合成及其复配聚磷酸铵对硅橡胶阻燃性能和力学性能的影响

发布时间：2018-06-10 05:17

本文选题：阻燃硅橡胶 + 磷酸锆　；参考：《高分子学报》2017年11期

【摘要】：利用原位插层反应制得磷腈类衍生物修饰的改性磷酸锆(F-ZrP),并用机械共混工艺制得阻燃硅橡胶复合材料(FRSR).采用X射线衍射(XRD)、透射电子显微镜(TEM)、傅立叶红外光谱(FTIR)、热重(TG)、扫描电子显微镜(SEM)分别对磷酸锆的结构及其在硅橡胶基体的分散进行表征,并结合FRSR的垂直燃烧(UL-94)、极限氧指数(LOI)、锥形量热测试及残渣表面形貌的观察,研究了不同份数的F-ZrP复配聚磷酸铵对FRSR阻燃性能的影响并和添加未改性磷酸锆的样品性能对比,并对阻燃机理进行初步探讨;最后分析FRSR的力学性能.结果表明:F-ZrP拥有更大的层间距,而且在FRSR中分散的更好;当1 phr F-ZrP和19 phr APP复配使用时,UL-94达V-0级且LOI值为31.4,热释放速率峰值为265.3 kW/m~2,拉伸强度达8.11 MPa,FRSR的阻燃性能和力学性能得到明显的改善.适量的F-ZrP和APP复配使用能在气相和固相发挥协效阻燃作用,F-ZrP与APP的并用能提高残渣质量并且使阻隔层更加紧实,致密.
[Abstract]:In situ intercalation reaction was used to prepare modified zirconium phosphate F-ZrPe modified by phosphorylonitrile derivatives, and the flame retardant silicone rubber composites were prepared by mechanical blending process. The structure of zirconium phosphate and its dispersion in silicone rubber matrix were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric (TG) and scanning electron microscopy (SEM). Combined with the vertical combustion of FRSR (UL-94), the limit oxygen index (LOI), the cone calorimetry test and the observation of residual surface morphology, the effect of F-ZrP mixed with ammonium polyphosphate on the flame retardancy of FRSR was studied and compared with that of the sample with unmodified zirconium phosphate. Finally, the mechanical properties of FRSR were analyzed. The results show that: (1) F-ZrP has larger interlayer spacing and better dispersion in FRSR. When combined with 1 phr F-ZrP and 19 phr app, the flame retardancy and mechanical properties of UL-94 were improved obviously, the loi value was 31.4, the peak heat release rate was 265.3 kW / m ~ (-2), and the tensile strength was 8.11 MPA / m ~ (-1). The combination of F-ZrP and app can improve the residual quality and make the barrier layer more compact and compact by the synergistic effect of F-ZrP and app in gas phase and solid phase.
【作者单位】：华南理工大学材料科学与工程学院;
【基金】：广东省省级科技计划项目(项目号014A010105017)资助
【分类号】：TB332;TQ333.93

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