A brief survey on CLAYPEN and Nanocomposites based on unmodified PE and organo-pillared clays
A brief survey on CLAYPEN and Nanocomposites based on unmodified PE and organo-pillared clays
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DOI：
10.1007/s00396-004-1225-x
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发表时间：
2005-04
影响因子：
2.4
通讯作者：
F. Bergaya;T. Mandalia;P. Amigouët
中科院分区：
文献类型：
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作者：
F. Bergaya;T. Mandalia;P. Amigouët
将新型粘土填料与线型低密度聚乙烯在160℃下共混10分钟，通过熔融插层法制备粘土-PE纳米复合材料(CLAYPEN)。用部分水解铝和铁盐溶液柱撑蒙脱土(Mt)，再与十六烷基三甲基溴化铵(OPMt)反应。为了进行比较，制备了十六烷基三甲基铵蒙脱土(OMT)作为参考物质。PE不被有机粘土插层。在柱撑粘土-PE纳米复合材料的研究中，X射线衍射仪并不是PE插层的合适指示剂，如透射电子显微镜所示，PE已渗透到介孔OPMt中。所有纳米复合材料的杨氏模量值均高于原始PE。OPMt-PE纳米复合材料在其他力学性能(拉伸强度和断裂伸长率)之间取得了最佳的折衷。锥形量热仪研究表明，加入5份这种新型OPMt填料后，PE的最大放热速率值显著降低(34%)。
New clay fillers are mixed with linear low-density polyethylene at 160 °C for 10 min to obtain clay-PE nanocomposites (CLAYPEN) by melt intercalation. Raw montmorillonite (Mt) was pillared (PMt) with partially hydrolyzed Al and Fe salt solutions and further reacted with hexadecyl trimethylammonium bromide (OPMt). For comparison, the hexadecyl trimethylammonium-montmorillonite (OMt) was prepared as a reference material. PE is not intercalated by organoclay. In investigating the pillared clay-PE nanocomposites, XRD is not an appropriate indicator of intercalation of PE, which penetrates into the mesoporous OPMt as shown by TEM. All the nanocomposites have higher Young modulus values than the pristine PE. The best compromise between the other mechanical properties (tensile strength and elongation at break) is obtained with the OPMt-PE nanocomposite. Cone-calorimeter study shows that peak heat release rate value of PE decreases substantially (34%) on addition of 5 phr of this novel OPMt filler.