摘要
采用在微波辐射条件下共沉淀法合成得到XOnm-/与CO32-以不同摩尔比混合插层的阻燃类Zn-Mg-Al水滑石(ZR-1),并将获得的4种阻燃类水滑石与低密度聚乙烯(LDPE)制成复合材料。用扫描电子显微镜(XRD)和热分析对样品进行表征。热分析结果表明:X酸根与碳酸根以1∶0的摩尔比混杂插层Zn-Mg-Al阻燃类水滑石(ZR-1-A)对LDPE的热氧分解有最好阻缓效果;热分解温度宽度达365.36℃。将ZR-1与ZR-1-A进行阻燃性能、力学性能及烟密度等测试的对比;发现ZR-1-A/LDPE比为40/60时,ZR-1-A/LDPE复合材料的极限氧指数(LOI)29%比ZR-1/LDPE复合材料的LOI28%略高;而ZR-1-A/LDPE复合材料的消烟效果(最大烟密度为16.44)却远不如ZR-1/LDPE复合材料(最大烟密度为0.24),水平燃烧试验均通过FH-1级。此外,ZR-1-A/LDPE复合材料的拉伸强度断裂伸长率和冲击强度均有所提高;从扫描电子显微镜照片(SEM)上可以看出,ZR-1-A/LDPE燃烧后可观察到更为致密而结实的覆盖物,这与阻燃性能的结果是一致的,从而使该类水滑石单独作为一类高效阻燃消烟新型阻燃剂使用成为可能。
A kind intercalation Zn-Mg-A1 hydrotalcites(ZR-1) which have different XOn^m-/CO3^2- mole ratio were prepared by coprecipitation under microwave radiation, then accede the 4 genus received hydrotalcites to LDPE, the compound materials were prepared. The samples were analyed by XRD and thermal decompositiorl. The resuhs of thermal decomposition show that acid radical XOn-m and carbonate which mole ra- tio is 1:0 intermix intercalation Zn-Mg-Al hydrotalcite(ZR-1-A) has excellent effect on the thermal decompo- sition of LDPE,and the temperature breadth of thermal dec, omposition reaches to 365.36~C. Contrast to ZR-1 and ZR-1-A, we discovered that the LOI of ZR-I-A/PE (ZR-1-A/PE=40/60) is the best,which up to 29; and the LOI of ZR-1/PE (ZR-1/PE=40/60) only 28; The smoke elimination effect of ZR-1-A/LDPE composite material, [maximum smoke density (Din) 16.44] less than ZR-1/LDPE (Din 0.24); Both flame retardant test passes FIt-1 level; the tensile strength,elongation at break and impact strength of ZR-1-A has advanced than same one of ZR-1; from the SEM image,we find that burnt ZR-1-A/LDPE has a compact and solid covering which consistent with the effect of flame retardant property. Accordingly, this kind of hydrotalcite which has the functions of flame-retardance and smoke elimination, may use as a new kind of high-efficiency flame-retardant agent.
出处
《塑料助剂》
2012年第1期28-33,共6页
Plastics Additives
关键词
水滑石
阻燃性能
微波辐射
共沉淀法
合成
hydrotalcite
flame retardance
microwave radiation
coprecipitation
synthesis