钙镁铝型三元类水滑石的合成及其在PVC中的应用  

Synthesis of Ca-Mg-Al Hydrotalcite-like Compounds and Application in the PVC

作　　者：杨占红[1] 迟伟伟[1] 易师[1] 王升威[1] 唐智[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《塑料助剂》2008年第2期18-21,共4页Plastics Additives

摘　　要：在Ca(NO3)2-Mg(NO3)2-Al(NO3)3-NaOH体系中,采用共沉淀法制备钙镁铝三元类水滑石。考察了反应沉淀过程的原料配比对合成水滑石结构的影响,并用XRD、IR和粒度分析等手段对合成样品进行分析和表征。结果表明:在制备条件x(Mg2+):x(Ca2+)为1～3,x(M2+)/x(M3+)为2～4范围内,反应沉淀pH值为10左右,合成的CaMgAl水滑石的晶相结构最完整。合成的产物可以大大改善PVC的热稳定性。The synthesis of Ca-Mg-Al hydrotalcite-like compounds （CaMgAl-HTLcs） by co-precipitation in the system of Ca（NO3）2-Mg （NO3）2-Al （NO3）3-NaOH were studied. The effects of raw material molar ratio and crystallization treatment on the structure of Ca-Mg-Al-HTLCs were also investigated.The synthesized samples were analyzed and characterized by using XRD, IR and granulometer. The results show that unique Ca-Mg-Al HTLcs with high crystallinity can be prepared by precipitation of solutions at a pH value of 10 with 1-3 of n （Mg） ： n （Al） and 2-4 of x（Mg ＋ Ca）：x（Al）. And the stability of PVC was significantly improved by using it.

关 键 词：水滑石 共沉淀 聚氯乙烯 合成 应用 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]