PP/IFR/有机改性层状硅酸盐复合材料的制备

Preparation of PP/IFR/organic modified layered silicate composites

采用微波法制备了有机改性层状硅酸盐,用硅烷偶联剂A-172对其进行表面改性,然后采用熔融共混法制备了聚丙烯(PP)/膨胀阻燃剂/有机改性层状硅酸盐复合材料。对复合材料进行表征,并研究了有机改性层状硅酸盐对复合材料热稳定性、结晶性能和阻燃性能的影响。结果表明:改性层状硅酸盐在PP基体中分散良好;复合材料的热稳定性改善,当添加的层状硅酸盐为蛭石时,最大降解速率下降最多,较纯PP下降了56.5%;复合材料的结晶性能提高,当添加的层状硅酸盐为黏土时,结晶度提升最大,较纯PP提升了14.7%;复合材料的阻燃性能保持良好。

Layered silicate was prepared by microwave method,whose surface was modified by silane coupling agent A-172.Then polypropylene(PP)/intumescent flame retardant/organic modified layered silicate composites was prepared via melt blending method.The composites were characterized and the effects of organic modified layered silicates on the thermal stability,crystallinity and flame retardancy of the composites were studied.The results show that the modified layered silicate disperse well in PP matrix,improving the thermal stability of the composites.The maximum degradation rate of the composites is decreased by 56.5%than that of pure PP when the layered silicate is vermiculite,whose crystallization properties is improved as well.The crystallinity of the composite is increased the highest by 14.7%than that of pure PP when selecting clay of layered silicate.The flame retardancy of the composites is good.