金属配合物在阻燃软聚氯乙烯(PVC)中的应用

研究了金属配合物与（Al（OH）3和Mg（OH）2）复合阻燃剂对软聚氯乙烯（PVC）的阻燃消烟作用。用Kissinger方程求出了聚合物降解反应的活化能，用热分析的方法结合氧指数、烟密度及剩炭率的测定，同时结合电子扫描显微镜（SEM）对剩炭结构的观察研究了金属配合物与氢氧化物（MH）对软PVC的阻燃机理及协同作用．对阻燃处理后的样品的机械性能进行了测定．结果表明：金属配合物与氢氧化物在配比合适时存在明显的协同作用，对软PVC有较好的阻燃消烟效果，这是由于金属配合物的催化成炭与氢氧化物对烟粒的吸附共同作用的结果．同时由于阻燃剂的添加量较小，对样品的力学性能影响不大．

Application of Metal Chelates in Flame Retardants for Flexible PVC

The metal chelates,Al(OH)_3 and Mg(OH)_2 as flameretardants and smoke suppression for flexible PVC was studied.The active energies were obtained by using the equation of Kissinger The flame-retardant mechanism of flexible PVC treated with various metal chelates combined with two compounds Al(OH)_3 and Mg(OH)_2 were studied by thermal analysis,Limiting Oxygen Index(LOI),Smoke Density Rating(SDR) and Char yield tests,respectively.The structure of the char formed after combusting of the PVC compounds was observed through scanning electron microscopy(SEM),and the mechanical properties were investigated.The results showed that there was a good synergistic effect between Al(OH)_3,Mg(OH)_2 and metal chelates because of the catalysis to form the char of the metal chelates and the absorber of the char by the Al(OH)_3 and Mg(OH)_2.The effects of the flame-retardants on the mechanical properties were limited because the amount the flame-retardants was dearth.