摘要
对膨胀石墨(EG)填充硬质聚氨酯泡沫塑料(RPUF)泡孔结构和填料分散情况进行了分析,研究了EG对RPUF的微观结构形态、泡孔平均直径和泡孔直径分布的影响;同时研究了EG对RPUF的压缩力学性能和电学性能的影响,并分析其压缩破坏的机理。结果表明EG使RPUF泡孔平均直径减小,泡孔尺寸分布减小,EG在反应体系中充当泡孔成核剂,石墨片层间距离小,并未形成插层复合结构。随EG用量的增加,RPUF的压缩强度和压缩模量轻微下降。不同膨胀倍率的EG对其压缩强度和压缩模量没有影响;EG填充RPUF的体积电阻没有变化,对其导电性能没有影响。
The cell structure and morphology of expanded graphite (EG) filled rigid PU foams (RPUF) were studied by means of SEM.The effects of EG on the morphological structure of RPUF and the cell average diameter and the distribution of the cell diameter were studied;the effects of EG on the compressive mechanical properties and electrical properties of RPUF were discussed,and the compressive fracture mechanism of the foam was analyzed.The results showed EG made the cell diameters and their distribution of RPUF decreased.EG acted as nucleating agent in the reactive system,the interlaminar space of the graphite was small,and did not form intercalation composite structure.The compressive strength and modulus of RPUF decreased a little with the increase of the content of EG.The compressive strength and modulus of RPUF were independent of the various expansion multiple of EG,the volume resistance of RPUF/EG had no change which showed EG had no effect on the conductivity of RPUF/EG.
出处
《塑料工业》
CAS
CSCD
北大核心
2005年第6期28-31,共4页
China Plastics Industry
基金
国家自然科学基金委员会-中国工程物理研究院联合基金资助项目(10276024)
关键词
膨胀石墨
硬质
聚氨酯
泡孔
压缩强度
模量
体积电阻
Expanded Graphite
Rigid
PU
Cell
Compressive Strength
Modulus
Volume Resistance
