摘要
使用旋转式流变仪研究了加入质量分数10％～30％的高密度聚乙烯和0～9％的硬脂酸后石蜡基粘结剂在120～162℃的流变行为。结果表明：粘结剂中石蜡与高密度聚乙烯含量之比K值对其黏度有重要影响，K值越小，黏度越大；当K≥4时，提高温度和加入硬脂酸不能降低其黏度；当K〈4时，提高温度是改善粘结剂流变性能的有效手段之一，而硬脂酸加入量存在一个临界值，只有超过该值时才能有效降低黏度；随K值减小，硬脂酸临界加入量也逐步降低；粘结剂熔体在150℃下表现出类似牛顿流体的流变行为。
The rheological behaviors of wax-based binders with high density polyethylene content from 10wt% to 30wt% and stearic acid （SA） content from 0 to 9wt% were studied by using rotary rhemeter in the temperature range of 120 to 162℃. The results show that the ratio of wax content to high density polyethylene content in binder, named as K, put a heavy impact on viscosity and the higher the K was, the lower the viscosity was. For a binder with K more than 4 raising temperature and adding SA showed little effect on reducing its viscosity, but raising temperature sounded an important and effective measure for those with K less than 4. Adding SA could reduce the viscosity, when its addition was over a threshold value. The threshold addition of SA decreased gradually with K decrease. The binder melt at 150 ℃ showed such rheological behaviors like a Newtonian viscous fluid.
出处
《机械工程材料》
CAS
CSCD
北大核心
2009年第10期27-29,67,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50674044)
中国博士后科学基金资助项目
国家留学基金资助项目
湖南省自然科学基金资助项目(05JJ30199)
关键词
粉末注射成型
粘结剂
流变行为
硬脂酸
powder injeetion molding
binder
theological behavior
stearie acid（SA）
