水镁石基有机无机复合阻燃剂的制备及应用

Preparation and application of brucite matrix organic-inorganic composite flame retardant

以水镁石、多聚磷酸和月桂胺为原料,通过对微米级水镁石颗粒表面改性和包覆多聚磷酸胺盐制备了具有核-壳结构的水镁石有机无机复合阻燃剂,通过X射线粉末衍射、红外光谱、热失重、扫描电子显微镜对合成产物的物相和形貌进行了表征。悬浮实验结果表明制备的水镁石基复合阻燃剂产品呈疏水性,表面极性的改变大大提高了复合阻燃剂产品与高聚物基体的相容性。添加40%(质量分数)的水镁石基复合阻燃剂产品用于EVA时极限氧指数为32.0%、拉伸强度为10.03MPa、断裂伸长率为719.0%,达到阻燃UL94-V0级别。

Core-shell brucite matrix organic-inorganic composite flame retardant were obtained by means of grafting aminepolyphosphate onto the surface of microparticle adopted brucite,polyphosphoric acid and laurylamine as material.Chemical phase and morphology of the obtained composite particles were characterized by XRD,FTIR,TGA,SEM.Suspension experiment indicates that the surface of brucite matrix composite flame retardant is hydrophobicity and it can greatly improve the compatibility.The results showed that the EVA product filled with the composite flame retardant at the value of 40% had the utmost limit oxygen index of 32.0%,tensile strength of 10.03MPa and elongation at break of 719.0% that can be in accordance with the level of UL94-V0.