MgAlCe-CO3-HTLcs were prepared by low saturated precipitation. The effects of many conditions such as pH,different molar ratios of n(Ce3+)/n(Al3+), aging temperature and aging time on the crystal form of MgAlCe-CO3-HTLcs were investigated. The synthesized materials were analyzed and characterized by using XRD, SEM, FT-IR and TG-DTA.The composites consisting of PVC, DOP and MgAlCe-CO3-HTLcs were prepared with specific ration, and the thermal stability of polyvinyl chloride (PVC) composites was studied by static thermal aging test and Congo Red method. The results show that MgAlCe-CO3-HTLcs has high crystallization degree and uniform structure when the preparation condition is as follows: pH≥11, n(M2+)/n(M3+)=2:1, 0.025≤n(Ce3+)/n(Al3+)≤0.050, aging at 110 ℃ for 8 h. The thermal stability of the PVC composites with MgAlCe-CO3-HTLcs is significantly enhanced with the onset of blackening lasting to about 110 min.%采用低过饱和沉淀法制备具有水滑石结构的镁铝铈类水滑石,探索pH、不同铈铝的物质的量比n(Ce3+)/n(A13+)、陈化温度和陈化时间对产物晶型的影响,利用XRD,SEM,FT-IR和TG-DTA等对其进行表征,将聚氯乙烯(PVC)、邻苯二甲酸二正辛酯(DOP)、镁铝铈类水滑石(MgAlCe-CO3-HTLcs)按一定比例复配,进行静态热老化试验和刚果红法试验,并对其热稳定性能进行研究.研究结果表明:控制溶液中pH≥11,0.025≤n(Ce3+)/n(Al3+)≤0.050,n(M2+)/n(M3+)=2:l,于110℃陈化8 h,能制备出具有典型的水滑石结构、结晶度高、结构完整、晶型单一的镁铝铈类水滑石.镁铝铈类水滑石能将PVC的热稳定时间延长至约110 min.
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