中文摘要：

采用氧指数法和锥形量热仪测试海藻酸钙纤维的阻燃性能，结果表明，海藻酸钙纤维具有优异的阻燃性能。其极限氧指数为34．4％，在空气中离火自熄；且燃烧过程中的热释放速率、有效燃烧热和总放热量比较低，二二氧化碳的生成速率比较高。采用热重分析仪、X-射线衍射仪和裂解-气相色谱一质谱联用仪研究海藻酸钙纤维的热分解过程以及不同裂解阶段的凝聚相裂解产物和气相裂解产物，发现海藻酸钙纤维具有阻燃性的原因在于组成纤维的海藻酸大分子的特殊结构，以及纤维中钙离子的作用。

英文摘要：

The flame retardant property of calcium alginate fibers is characterized by limiting oxygen index method and cone cal- orimeter. The results show that the limiting oxygen index of calcium alginate fibers is 34.4%, no flame burning in air and extin- guishes instantly as soon as they are moved away from fire. During combustion process, the heat release rate （HRR）, effec- tive heat of combustion （EHC） and total heat release （THR） of calcium alginate fibers are lower while carbon dioxide yield rate of calcium alginate fibers is high, which means calcium alginate fibers have excellent flame retardant property. Thermal degra- dation and component of pyrolysis products of calcium alginate fibers are investigated by thermal gravimetry, X-ray diffraction and pyrolysis-gas chromatography-mass spectrometry. The reasons for flame retardancy of calcium alginate fibers are the spe- cial structure of alginic acid macromolecules which are the components of calcium alginate fibers and the effect of calcium ions contained in fibers.