摘要
为改善超高相对分子质量聚乙烯(UHMWPE)的加工流变性,将超支化聚酯酰胺(HBP)和线性低密度聚乙烯(LLDPE)与UHMWPE共混,研究了不同比例UHMWPE/LLDPE/HBP共混体系的流变行为。结果表明:UHMWPE/LLDPE/HBP共混体系熔体表观粘度随HBP质量分数的增加而减小;共混体系非牛顿指数<1,为典型的切力变稀流体;当剪切速率为10 s-1时,共混体系的粘流活化能较小;结构粘度指数随HBP质量分数增加而下降,随UHMWPE粘均相对分子质量增加而增大。
In order to improve the processing properties of ultra-high molecular weight polyethylene, blends of ultra-high molecular weight polyethylene/liner low density polyethylene/hyper-branched polyester-amide were prepared. The rheological behavior of UHMWPE/LLDPE/HBP blends was researched in this paper. The results indicated the apparent viscosity of the blends first deceases and then increases with increasing of HBP content. The blends are shear-thinning fluid and the non-Newtonian index less than 1. The viscous flow activation energy of the blends is lowest when the shear rate is 10 s~. The structural viscosity index of blends was decreased with the HBP content increased and increase with the viscosity average relative molecular weight of UHMWPE increased.
出处
《高科技纤维与应用》
CAS
2012年第6期43-47,56,共6页
Hi-Tech Fiber and Application
基金
中央高校基本科研业务费资金重点项目(11D10625)
关键词
超高相对分子质量聚乙烯
超支化聚酰胺酯
共混
流变行为
研究
ultra-high molecular weight polyethylene
hyper-branched polyester-amide
blend
rheological behavior
research
