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短支链结构及支化度对高密度聚乙烯性能的影响
发表时间：2010-09-15 浏览量：3042 下载量：951
| 全部作者： | 张洁，伍剑，李耀，段宏毅，郭金山 |
| 作者单位： | 兰州大学化学化工学院高分子化学与物理研究所；中国石油兰州化工研究中心 |
| 摘 要： | 实验通过高温液体核磁共振(nuclear magnetic resonance, NMR)筛选出3种对比性较强的短支链高密度聚乙烯（high-density polyethylene,HDPE），在不做任何物理或化学改性的前提下，通过一系列实验研究了支化密度和支链种类对HDPE性能的影响。证明了对于短支链HDPE的流变性能，支化密度高的对温度较为敏感，支链长的对剪切速率较为敏感；而对于结晶性能和抗环境应力开裂性能，支化种类的影响较为显著。 |
| 关 键 词： | 高分子化学；短支链高密度聚乙烯；流变性能；结晶性；抗环境应力开裂能力 |
| Title： | Effect of short branched structure and branching degree on the rheological, crystallization properties and environmental stress cracking resistance of high density polyethylene |
| Author： | ZHANG Jie, WU Jian, LI Yao, DUAN Hongyi, GUO Jinshan |
| Organization： | Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University; PetroChina Lanzhou Petrochemical Research Center |
| Abstract： | In this study, three kinds of short-branched-chain high-density polyethylene (HDPE) which could compared very well were selected by high temperature liquid nuclear magnetic resonance (NMR). Those HDPE was not modified by any physical or chemical methods. A series of experiments were carried out to focus on the influence of the branching density and branched-chain type on the performance of HDPE. The research results show that the effect of branching density on the rheological properties mainly lies on temperature and the effect of branched-chain length lies more on the shear rate; while the impact of branching type is more significant for the crystalline properties and resistance to environmental stress cracking properties. |
| Key words： | polymer chemistry; short-branching high-density polyethylene; rheology; crystallization; environmental stress cracking resistance |
| 发表期数： | 2010年9月第17期 |
| 引用格式： | 张洁，伍剑，李耀，等. 短支链结构及支化度对高密度聚乙烯性能的影响[J]. 中国科技论文在线精品论文，2010，3（17）：1763-1770. |
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