阻燃协效剂与膨胀型阻燃剂在木粉/聚丙烯复合材料中的阻燃协效性

摘要

The fire retarded synergistic agents of montmorillonoite（MMT）,zinc borate（ZB） and MnO2 were respectively blended with the intumescent fire retardant（IFR） to prepare the fire retarded korean pine wood flour/polypropylene composites.The fire retarded synergistic effect was evaluated by the thermal analysis of TG,DTG and DSC and was further validated by FTIR and SEM.The results indicate that there is some fire retardant synergy among the three kinds of synergistic agents and IFR.MMT decreases the heat release and increases the char residue significantly.The synergistic effect of ZB is mainly incarnated in the second stage of thermal decomposition,and it can result in the foamed char residue.While the role of MnO2 is in the first stage of thermal decomposition,and it promotes the decomposition of ammonium polyphosphate（APP） in advance,reduces the pyrolysis rate of the system,and makes the char residue more stable and dense.%采用膨胀型阻燃剂（IFR）分别与蒙脱土（MMT）、硼酸锌（ZB）、MnO2阻燃协效剂复配制备了阻燃型红松木粉/聚丙烯复合材料。借助TG、DTG、DSC热分析技术深入探讨了IFR与阻燃协效剂间的协效性;并利用FTIR、SEM对协效性进行了验证。结果表明：三种阻燃协效剂与IFR间都存在一定的协效性;MMT的加入降低了热分解过程的热释放量,并显著提高了材料的残炭量;ZB的协效性主要体现在热分解的第二阶段,并使最终的残渣呈现出一种泡状结构;而MnO2主要在热分解的第一阶段发挥作用,可催化聚磷酸铵（APP）提前分解,同时降低体系的热解速率,并使残渣致密化。