摘要
通过添加少量高熔体强度的支化聚丙烯,制备了开孔率低、泡孔密度大、泡孔尺寸小、泡孔分布均匀的聚丙烯挤出发泡材料;通过发泡材料断面的SEM分析,比较了成核剂类型和粒径对泡孔密度和尺寸的影响。以偶氮二甲酰胺为发泡剂,添加1％的成核剂,所得发泡材料的泡孔密度为5．331×106个／cm3、泡孔直径为93μm。同时发现较高的螺杆转速有利于得到均匀的泡体结构。
Extruded polypropylene foam with low open cell content, high cell density, small and uniform cell size was prepared via blending conventional linear polypropylene with a small amount of high melt strength polypropylene （HMSPP）. Effects of the nature and particle size of the nucleating agent on the cell density and cell size were studied via SEM analyzing. When the content of nucleating agent talc was 1%, the particle size was 5 μm, using AC as the blowing agent; the obtained foam gave a cell density of 5. 331 × 10^6 cells/cm^3, and a cell size of 93 μm. It was also found that higher screw rotating speeds favored the uniformity of the foam structure.
出处
《中国塑料》
CAS
CSCD
北大核心
2005年第11期74-77,共4页
China Plastics
关键词
聚丙烯
挤出发泡
成核剂
泡孔密度
泡孔尺寸
polypropylene
extrusion foaming
nucleating agent
cell density
cell size
