Ⅱ型聚磷酸铵和赛克对聚丙烯的协同阻燃作用

Synergistic Flame Retardancy of Type Ⅱ Ammonium Polyphosphate and 1,3,5-Tri(2-hydroxyethyl) Cyanuric Acid in Polypropylene

对Ⅱ型聚磷酸铵(APP-II)和三(2-羟乙基)异氰尿酸酯(赛克)协同阻燃聚丙烯进行了研究。结果表明,APP-II和赛克以质量比为2.5∶1复合而成的阻燃剂对PP具有良好的协同阻燃作用。当该阻燃剂添加量为30%(质量分数)时,PP的极性氧指数(LOI)为30.7%,阻燃级别达FV-0级,燃烧时的热释放速率、质量损失速率和总热释放量明显降低。热重和燃烧残余物分析结果表明,高温下APP能够促使三(2-羟乙基)异氰尿酸酯(THEIC)和PP成炭,而APP和THEIC分解释放出的氨气使炭层膨胀,由此形成的致密膨胀炭层通过隔绝作用而产生阻燃和抑烟作用。

Synergistic flame retardancy of type II ammonium polyphosphate（APP-II） and 1,3,5-Tri（2-hydroxyethyl） cyanuric acid（THEIC） in polypropylene（PP） was studied.The experimental results showed that the composite consisted of 2.5 parts f APP-II and 1 part of THEIC has good synergistic flame retardance in PP.When the loading of the flame retardants in PP was 30% based on the total weight,the LOI of the flame retarded PP was 30.7%,and the flame retardancy class meet FV-0,the heat release rate,mass loss rate and total heat release were decreased obviously.The thermogravimetric results and the analysis of the residues after the combustion indicated that APP-II can char THEIC and PP under higher temperatures,and ammonia released from the decomposition of APP-II and THEIC intumesee the char.The intumescent charred layer results in flame retardancy and smoke-suppression by disconnection.