| 管材专用高密度聚乙烯的研究进展 |
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| 引用本文： | 姜凯,王莉,卢晓英,祖凤华,义建军. 管材专用高密度聚乙烯的研究进展[J]. 合成树脂及塑料, 2012, 0(3): 76-79 |
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| 作者姓名： | 姜凯 王莉 卢晓英 祖凤华 义建军 |
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| 作者单位： | 中国石油天然气股份有限公司石油化工研究院合成树脂重点实验室 |
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| 基金项目： | 中国石油科技创新基金(2010D-5006-0501) |
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| 摘 要： | 综述了国内高密度聚乙烯(HDPE)的生产装置及工艺。采用双峰聚合工艺使短支链更多地分布在高相对分子质量部分是HDPE管材从PE80级升至PE100级的主要原因。管材的耐环境应力开裂性能随HDPE相对分子质量减小而下降,提高短支链含量可提高管材的耐环境应力开裂性能。HDPE的相对分子质量越高,管材抗裂纹扩展性能越好,将短支链分布在高相对分子质量端可提高抗裂纹扩展性能。
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| 关 键 词： | 高密度聚乙烯 管材专用树脂 系带分子 环境应力开裂 快速裂纹扩展 流变 |
Progress in high density polyethylene special resin for pipes |
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| Jiang Kai, Wang Li, Lu Xiaoying, Zu Fenghua, Yi Jianjun. Progress in high density polyethylene special resin for pipes[J]. China Synthetic Resin and Plastics, 2012, 0(3): 76-79 |
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| Authors: | Jiang Kai Wang Li Lu Xiaoying Zu Fenghua Yi Jianjun |
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| Affiliation: | (Key Laboratory of Synthetic Resin, PetroChina Petrochemical Research Institute, Beijing 100195, China) |
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| Abstract: | The authors reviewed domestic high density polyethylene (HDPE) plants and the technologies thereof. Adopting bimodal polymerization process to make short-chain branches more distributed in the segments with high relative molecular mass constituted the main reason for facilitating the upgrade of HDPE tubing from PE80 to PE100. Environmental stress cracking resistance(ESCR) of the HDPE tubing usually reduced with the decrease in relative molecular mass of HDPE and improved with the rise in the content of short-chain branches. In general, the higher the relative molecular mass, the stronger the tubing’s resistance to rapid crack propagation (RCP). Distributing the short-chain branches in the segments with high relative molecular mass could raise the resistance to RCP. |
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| Keywords: | high density polyethylene special resin for pipes tie molecule environmental stress cracking rapid crack propagation rheology |
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