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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:2281  下载量:874
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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