| 超支化聚(酯-酰胺)改善超高分子量聚乙烯的流动机理 |
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| 引用本文： | 唐黎明,齐东超,邱义鹏,冯吉.超支化聚(酯-酰胺)改善超高分子量聚乙烯的流动机理[J].清华大学学报(自然科学版),2006,46(6):833-835. |
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| 作者姓名： | 唐黎明 齐东超 邱义鹏 冯吉 |
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| 作者单位： | 清华大学,化学工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金;面向21世纪教育振兴行动计划(985计划) |
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| 摘 要： | 研究了超支化聚(酯酰胺)(简称PF2)改善超高分子量聚乙烯(简称UHMW-PE)加工流动性的作用机理。采用扫描电镜(SEM)和X射线光电子能谱(XPS)分析PF2在共混物中的分布。结果显示PF2在共混物表面的含量高于内部。表明在剪切作用下,PF2易于在共混物表面富集,破坏受剪切面上UHMW-PE分子的链缠结并起到分子链间的滑动轴承作用,从而降低体系的表观粘度。PF2可改善UHMW-PE分子间的结合力。
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| 关 键 词： | 超支化聚(酯-酰胺) 超高分子量聚乙烯 流变改性 机理 |
| 文章编号： | 1000-0054(2006)06-0833-03 |
| 修稿时间： | 2005年4月23日 |
Rheological modifying mechanism of ultra-high-molecular-weight polyethylene by hyperbranched poly(ester-amide) |
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| TANG Liming,QI Dongchao,QIU Yipeng,FENG Ji.Rheological modifying mechanism of ultra-high-molecular-weight polyethylene by hyperbranched poly(ester-amide)[J].Journal of Tsinghua University(Science and Technology),2006,46(6):833-835. |
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| Authors: | TANG Liming QI Dongchao QIU Yipeng FENG Ji |
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| Abstract: | The mechanism for rheological modification of ultra-high-molecularweight polyethylene(UHMW-PE) by hyperbranched poly(ester-amide)(PF__2) was investigated by scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy (XPS) analysis of PF__2/UHMW-PE blends.The results show that there is more PF__2 at the surface than in the center of the blend.Shear forces cause the PF__2 molecules to aggregate at the surface of the blends,thus reducing the apparent blend viscosity.The intermolecular adhesion of UHMW-PE was improved by the presence of PF__2. |
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| Keywords: | hyperbranched poly(ester-amide) ultra-high-molecul-ar-weight polyethylene rheological modification mechanism |
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