短支链结构及支化度对高密度聚乙烯流变性、结晶性和抗环境应力开裂能力的影响
首发时间:2010-02-04
摘要:本实验通过高温液体核磁筛选出三种对比性较强的短支链高密度聚乙烯,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高密度聚乙烯性能的影响。证明了对于短支链高密度聚乙烯的流变性能,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: 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
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Effect of short branching on the rheological, crystallization properties and Environmental Stress Cracking Resistance of high density polyethylene
Abstract:In this series of experiments, three kinds of short-branched-chain high-density polyethylene (HDPE) were selected by high temperature liquid NMR, without any physical or chemical modification of the premise, to focus on the influence of the branching density and branched-chain type on the performance of HDPE. The research results shows 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.
Keywords: Short branching High density polyethylene Rheology Crystallization Environmental Stress Cracking Resistance
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短支链结构及支化度对高密度聚乙烯流变性、结晶性和抗环境应力开裂能力的影响
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