摘要
利用线性聚丙烯(PP)和有机化处理的纳米蒙脱土(nano-OMMT)在双螺杆挤出机上熔融插层法制备了PP/nano-OMMT复合材料。通过在PP/nano-OMMT复合材料中加入少量的高熔体强度聚丙烯(HMS-PP)以及复合发泡剂,通过连续挤出制备了PP/HMS-PP/nano-OMMT发泡棒材。利用扫描电镜观察了不同HMS-PP和不同的OMMT含量对发泡棒材发泡行为的影响,并利用透射电镜观察了OMMT在发泡制品中的分散及分布状况。结果表明:适量加入HMS-PP可以改善复合材料的发泡性能,所得发泡制品的泡孔密度增大,泡孔的合并现象明显改善;nano-OMMT在靠近泡孔壁面的位置有取向分布的趋势,这有利于得到闭孔形式的泡孔结构。
The liner polypropylene/organicalty-modified nano-montmorillonite （PP/nano-OMMT） composites were synthesized by means of melt intercalation in twin-screw extruder. By adding a mount of high melt strength polypropylene （HMS-PP） to PP/nano-OMMT composites, PP/HMS-PP/nano-OMMT composites foams were continuously foamed. Different content of HMS-PP or OMMT on the foaming behavior of foam bar was observed by SEM. The dispersion and distribution of nano-OMMT in PP was observed by TEM micrographs. The results showed that the proper addition of HMS-PP improved the foaming property of the composite, with cell density increasing and the cell merger phenomenon improved significantly. The distribution of nano-OMMT was along the cell boundary, and this distribution of OMMT may be benefit to get closed cell structure.
出处
《塑料工业》
CAS
CSCD
北大核心
2010年第12期67-69,80,共4页
China Plastics Industry
基金
青岛科技大学博士基金资助项目
关键词
聚丙烯
高熔体强度聚丙烯
纳米蒙脱土
复合材料
发泡
泡孔结构
Polypropylene
High Melt Strength Polypropylene
Nano-montmorillonite
Composites
Foaming
Cell Morphology
