苯基磷酸铁的制备及其对热塑性聚氨酯的阻燃性能

Preparation of phenylferric phosphate and its flame retardation for TPU

为提高热塑性聚氨酯(TPU)的防火安全性,以苯基磷酸(H_(2)PP)为原料,经碱化处理后与氯化铁进行反应,制备苯基磷酸铁(PPFe),并用于TPU的阻燃。采用FTIR、EDS、TG等对所制备PPFe的结构和热稳定性进行了分析,并利用万能材料试验机、热重分析仪、极限氧指数仪、垂直燃烧仪、锥形量热仪测定PPFe质量分数对TPU力学性能、热稳定性和燃烧性能的影响。结果表明:当PPFe质量分数为5.0%时,TPU燃烧过程中的总热释放量(THR)、热释放峰值(PHRR)、CO_(2)释放量分别降低了38.8%、38.8%和38.9%;当PPFe质量分数为7.5%时,TPU复合材料的极限氧指数(LOI)为25.4,可以达到UL-94V-1级。PPFe制备简单,便于工业化生产,并对TPU有良好的阻燃效果。

In order to improve the fire safety of thermoplastic polyurethane,phenylphosphoric acid(H_(2)PP)was used as the raw material,to react with ferric chloride after alkaline treatment,and prepare phenylferric phosphate(PPFe)to retard flame for TPU.The structure and thermal stability of the prepared PPFe were analyzed by FTIR,EDS and TG,etc.and the effect of PPFe mass fraction on the mechanical properties,thermal stability and combustion properties of TPU was determined by the universal material testing machine,thermogravimetric analyzer,limiting oxygen index meter,vertical combustion tester and cone calorimeter.The results indicated that when the PPFe mass fraction was 5.0%,the total heat release(THR),peak heat release(PHRR),and CO_(2)release in the combustion process of TPU decreased by 38.8%,38.8%,and 38.9%,respectively.When the PPFe mass fraction was 7.5%,the limiting oxygen index(LOI)of TPU composite was 25.4,which could reach UL-94V-1.PPFe was easy to prepare and produce industrially,and had a good flame retardant effect on TPU.