【摘要】：目的研究納米氧化鋁(Al_2O_3)對聚丙烯(PP)/堿式硫酸鎂晶須(MHSH)/氮-磷復(fù)配阻燃劑(N-P)復(fù)合材料力學(xué)性能和燃燒性能的影響。方法對MHSH和Al_2O_3進(jìn)行表面改性處理,利用混合機(jī)將PP、MHSH、Al_2O_3和氮-磷復(fù)配阻燃劑進(jìn)行混合,采用熔融共混法制備PP/MHSH/Al_2O_3/N-P復(fù)合材料。結(jié)果當(dāng)Al_2O_3的添加質(zhì)量分?jǐn)?shù)為8%時,復(fù)合材料的力學(xué)性能較佳,隨著Al_2O_3含量的繼續(xù)增加,復(fù)合材料的力學(xué)性能逐漸降低;Al_2O_3質(zhì)量分?jǐn)?shù)為5%時,復(fù)合材料的極限氧指數(shù)(LOI)為23.6%,其阻燃性能明顯得到提高,隨著Al_2O_3填充量的繼續(xù)增加,復(fù)合體系的LOI增長速度變緩;當(dāng)Al_2O_3質(zhì)量分?jǐn)?shù)為8%時,復(fù)合材料力學(xué)和阻燃綜合性能最佳。結(jié)論 Al_2O_3經(jīng)表面改性處理后,其在PP基材中分散良好,對聚丙烯復(fù)合材料起到補(bǔ)強(qiáng)和增韌作用,復(fù)合材料的阻燃性能也得到了改善。
[Abstract]:Aim to study the effects of nano-alumina (Al_2O_3) on the mechanical and combustion properties of polypropylene (PP) / basic magnesium sulfate whisker (MHSH) / nitrogen-phosphorus (N-P) composite flame retardant composites. Methods the surface modification of MHSH and Al_2O_3 was carried out. The PP,MHSH,Al_2O_3 and N-P flame retardants were mixed in a mixer. The PP/MHSH/Al_2O_3/N-P composites were prepared by melt blending. Results when the mass fraction of Al_2O_3 was 8%, the mechanical properties of the composites were better. With the increase of Al_2O_3 content, the mechanical properties of the composites decreased gradually. When the mass fraction of Al_2O_3 was 5%, the ultimate oxygen index (LOI) of the composite was 23.6%, and the flame retardancy of the composite was improved obviously. With the increase of Al_2O_3 content, the growth rate of LOI in the composite system became slower. When the mass fraction of Al_2O_3 is 8%, the mechanical and flame retardant properties of the composites are the best. Conclusion Al_2O_3 is well dispersed in PP matrix after surface modification, which can strengthen and toughen PP composites and improve the flame retardancy of PP composites.
【作者單位】： 河南機(jī)電職業(yè)學(xué)院;
【基金】：河南省科技廳科技發(fā)展計劃(142102210042)
【分類號】：TB484
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本文編號：2432321