动态保压注射成型HDPE／Nano-OMMT复合材料的结构与性能  

Structure and Properties of HDPE/Nano-OMMT Composite by Dynamic Packing Injection Molding

作　　者：胡娟[1,2] 王中武[1] 严山明[1] 高雪芹[1] 邓聪[2] 张杰[1] 申开智[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610065 [2]四川大学分析测试中心,四川成都610065

出　　处：《塑料工业》2011年第12期58-62,共5页China Plastics Industry

基　　金：国家自然科学基金(50803038)

摘　　要：聚合物/黏土纳米复合材料是近几年聚合物材料改性的热点。为了进一步理解复合材料性能与结构的关系,利用自行研制的动态保压装置,借助WAXD、DSC、SEM等测试方法,研究了高密度聚乙烯(HDPE)/纳米有机蒙脱土(nano-OMMT)复合材料的结构与性能。结果表明,动态保压使OMMT纳米粒子在基体中的分散性提高,并形成插层结构。与此同时,动态剪切力场使HDPE/nano-OMMT复合材料的HDPE基体结构形态亦发生变化,试样中生成串晶结构,相比常规注塑试样,动态保压试样结晶度最大提高15%,结晶形态的变化和结晶度的提高均有利于HDPE/nano-OMMT复合材料强度的提高。力学性能试验显示,拉伸强度和冲击强度同时得到提高,HDPE/nano-OMMT复合试样的拉伸强度最大提高了119%,冲击强度最大提高430%。Polymer/clay nano-composites were extensively explored in recent years. For better understanding the relationship between structure and property of polymer material, in this paper, structure and property of HDPE/nano-OMMT composites were discussed prepared by a self-made dynamic packing injection molding （DPIM） device by WAXD, DSC and SEM. Results showed that the dispersion of nano-OMMT was exclusively improved and formed intercalated structure. On the other hand, The formation of shish-kebab was also detected in dynamic HDPE/nano-OMMT composites. Compared with conventional injection molding, the crystallinity of dynamic packing HDPE/nano-OMMT was increased by 15% , which was facilitated to improve the strength of HDPE/nano-OMMT composites. Mechanical test demonstrated both tensile strength and impact strength enhanced. In addition, the maximum increase of tensile strength and impact strength were 119% , 430% , respectively.

关 键 词：动态保压 纳米有机蒙脱土 力学性能 结构 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]