【摘要】 采用原位悬浮聚合制备了聚氯乙烯/纳米水滑石(PVC/HT)复合材料,并进一步与ZnO、MgO复合。采用锥形量热仪分析了PVC/HT/ZnO/MgO复合材料的燃烧特性。结果表明,HT、ZnO、MgO在PVC基体中分散良好,HT/ZnO/MgO对降低PVC燃烧过程中的热释放速率和烟雾释放速率有良好的协同作用。PVC/HT/ZnO/MgO(95/5/3/3)复合材料的最大热释放速率和最大烟雾释放速率比纯PVC降低了50%以上,残留率明显提高。PVC/HT/ZnO/MgO复合材料的拉伸强度和缺口冲击强度均大于PVC/ZnO/MgO复合材料。更多还原

【Abstract】 In this paper,poly(vinyl chloride)/nano hydrotalcite(PVC/HT) composites were prepared by in-situ suspension polymerization,which were further blended with ZnO and MgO.The combustion properties of PVC/HT/ZnO/MgO composites were investigated using cone calorimetry.It was found that HT,ZnO and MgO were well dispersed in PVC matrix.ZnO and MgO had the synergistic effect with HT on reducing the heat and smoke release rates during combustion.Compared to neat PVC,the peak heat and smoke release rates of PVC/HT/ZnO/MgO(95/5/3/3) composite decreased more than 50 %,and the char yield was obviously increased.It was also found that tensile and impact strength of PVC/HT/ZnO/MgO composites were greater than that of PVC/ZnO/MgO composites.更多还原