摘要
通过对聚丙烯(PP)进行改性,探讨在加入无卤膨胀型阻燃剂(IFR)后,再加入不同比例的纳米有机蒙脱土(OMMT)条件下,对于聚丙烯(PP)在阻燃性能,力学性能,以及微观形态上产生的影响。通过极限氧指数(LOI)、垂直燃烧、SEM图像、红外和热重分析以及力学性能测试等,研究MMT对以聚丙烯和IFR为基体的材料的阻燃特性和力学性能的影响。实验结果表明:蒙脱土加入以IFR与聚丙烯复合的基体当中,其自身并未与材料形成插层结构,并且使得IFR原有的膨胀性受到抑制,材料的氧指数下降,成炭作用降低,整体的阻燃效果下降;但是蒙脱土的加入又使得材料的热稳定性提高,耐热性变好。蒙脱土在材料当中作为应力集中点,导致材料的内应力加大,力学性能变差。
In the study, the adding different contents nano oganomontmorillonite （OMMT）in polypropylene were discussed. The composites were modified by intumescent flame retardant（IFR）. It effeeted polypropylene （PP） on the flame-retardant properties, mechanical pro-perties and morphology. The OMMT contents were test- ed that was how to affect PP＇s flame retardancy and mechanical properties by oxygen index, vertical burn, SEM images, the thermal gravimetrie analysis and IR and mechanical properties. When montmorillonite was added to polypropylene that had been modified by IFR, they did not form intercalation structure, IFR＇s expansion was inhibit-ed,oxygen index felt, charring effect reduced, retardant effect was a little dropped;but montmorillonite was added to let thermal stability, heat resistance be improved and mechanical properties were deteriorated.
出处
《塑料助剂》
2017年第4期20-25,共6页
Plastics Additives
