CFA/APP协同阻燃动态硫化热塑性弹性体的制备及其性能

Preparation and properties of TPV synergistic ?ame retarding with CFA/APP

将新型无羟基低聚三嗪衍生物(CFA)作为成炭剂与聚磷酸铵(APP)复配成膨胀型阻燃剂(IFR),并研究了不同含量和比例的IFR对动态硫化热塑性弹性体(TPV)阻燃性能、热稳定性能、流变性能和力学性能的影响。结果表明:IFR对TPV有良好的阻燃作用,当IFR(CFA与APP质量比1∶3)质量分数为40%时,TPV/IFR复合材料具有最佳的阻燃性能,极限氧指数为26.4%,且垂直燃烧测试等级为V-0级;TPV/IFR复合材料的热释放速率峰值与总热释放量均大幅降低;IFR能促使TPV/IFR复合材料形成更多的残炭,积分程序分解温度和表观活化能明显增加,材料的热稳定性显著提高;TPV/IFR复合材料虽然加工性能略有降低,但具有优异的力学性能,能满足加工使用要求。

The intumescent flame retardant(IFR)was prepared by compounding the novel un-hydroxyl oligomeric triazine derivatives(CFA)with ammonium polyphosphate(APP).The effects of IFR in different content and ratio on the flame retardant properties,thermal stability,rheological properties and mechanical properties of thermoplastic vulcanizates(TPV)were investigated.The results show that IFR has a good flame retardant effect on TPV.When the mass fraction of IFR(the mass ratio of CFA to APP is 1∶3)is 40%,the TPV/IFR composites perform best in flame retandancy whose limit oxygen index(LOI)is 26.4%and pass vertical flame test with V-0.Both the peak heat release rate(PHRR)and total heat release(THR)of the composites slump.Thermogravimetric(TG)analysis shows that IFR helps to form more char residues in the TPV/IFR composites,the integration procedure decomposition temperature and apparent activation energy are increased,and the thermal stability of the material is improved.Although the processing performance of the TPV/IFR composites is slightly reduced,it possesses excellent mechanical properties and still meets the requirements of processing and use.