中文摘要：

通过熔融共混制备了一系列含有不同金属化合物的PLA／聚磷酸胺（APP）／超支化成炭剂（EA）／金属化合物阻燃复合材料，并通过极限氧指数（LOI）、垂直燃烧以及锥形量热测试对复合材料的阻燃性能进行了表征。结果表明，3种含锌金属化合物即3．5水硼酸锌、ZnO以及ZnSnO、的加入不仅使PLA阻燃复合材料的LOI均提高至35％以上，而且在垂直燃烧测试中达到了UL94V加级别。扫描电子显微镜结果显示，加入以上3种含锌金属化合物的复合材料的炭层连续、致密，呈现明显的闭孔发泡结构，该结构能够起到更好的隔热隔氧效果，从而提高复合材料的阻燃性能。在这3种含锌金属化合物中，含ZnO的复合材料在锥形量热测试中表现出最好的阻燃效果。

英文摘要：

A series of flame retardant PLA / APP / EA / metallic compound composites with different kinds of metallic compounds were prepared by melt blending. Flame retardant properties of these composites were investigated by LOI, vertical burning test （UL-94） and cone calorimetry test. Results show that the addition of 2ZnO. 3B2O3 - 3.5H2O, ZnO or ZnSnO3 not only improves the LOI value of the flame retardant composites to above 35% respectively, but also makes the composites all reach UL 94 V-0 level in vertical burning test. The SEM results show that the char layer of the flame retardant PLA composites containing 2ZnO· 3B2O3·5H20, ZnO and ZnSnO3 respectively all display a continuous and compact morphology with closed cell structure, the structure can increase the barrier effect of the char layer, which offer the composites excellent flame retardant performance. In cone calorimetry test, the composite containing ZnO show better flame retardant property than the others.