中国塑料 ›› 2025, Vol. 39 ›› Issue (6): 6-9.DOI: 10.19491/j.issn.1001-9278.2025.06.002

• 材料与性能 • 上一篇    下一篇

PE⁃LD的添加对双峰聚乙烯抗熔垂性能的影响

金裕程1(), 王璟璠2, 赵世成2()   

  1. 1.中国石油天然气股份有限公司华东化工销售分公司,上海 200122
    2.上海市多相结构材料化学工程重点实验室,华东理工大学化工学院,上海 200237
  • 收稿日期:2024-07-26 出版日期:2025-06-26 发布日期:2025-06-20
  • 通讯作者: 赵世成(1978-),男,教授,博士生导师,高性能聚烯烃添加剂的设计制备及其机理及聚烯烃改性,zhaosc@ecust.edu.cn
    E-mail:429424445@qq.com;zhaosc@ecust.edu.cn
  • 作者简介:金裕程(1991-),男,经济师,聚烯烃改性,429424445@qq.com

Effect of addition of PE⁃LD on anti⁃sag performance of bimodal polyethylene

JIN Yucheng1(), WANG Jingfan2, ZHAO Shicheng2()   

  1. 1.PeteoChina East China Chemicals Marketing Company,Shanghai 200122,China
    2.Shanghai Key Laboratory of Multiphase Materials Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Received:2024-07-26 Online:2025-06-26 Published:2025-06-20
  • Contact: ZHAO Shicheng E-mail:429424445@qq.com;zhaosc@ecust.edu.cn

摘要:

为改善双峰聚乙烯HDPE100S的抗熔垂性能,基于低密度聚乙烯 (PE⁃LD) 的长支链结构特征提出了其与HDPE100S共混加工的方法。通过熔体流动速率仪、微量混合流变仪和旋转流变仪研究了PE⁃LD的添加对HDPE100S抗熔垂性能的影响。并通过差示扫描量热仪研究了PE⁃LD的添加对HDPE100S结晶熔融性能的影响。结果表明,PE⁃LD的加入对HDPE100S的熔体流动速率影响不明显,但能够显著提高HDPE100S的加工扭矩、零剪切黏度(η0)和松弛时间(λ),说明PE⁃LD的添加能够有效改善HDEP100S的抗熔垂性能。

关键词: 双峰聚乙烯, 低密度聚乙烯, 流变行为, 抗熔垂性能, 熔融结晶行为

Abstract:

To address the sagging resistance of HDPE100S, this study introduces a blending strategy utilizing low⁃density polyethylene (PE⁃LD), leveraging its long⁃chain branching characteristics. The impact of PE⁃LD incorporation on the rheological and anti⁃sagging properties of HDPE100S was systematically evaluated using melt flow index, capillary rheometry, and rotational rheometry. The experimental results indicated that the addition of PE⁃LD had negligible impact on the melt flow rate (MFR) of HDPE100S. Significant increases in processing torque, zero⁃shear viscosity, and relaxation time were observed, indicating enhanced melt elasticity and sagging resistance. Differential scanning calorimetry analysis further elucidated the influence of PE⁃LD on the crystallization and melting behavior of HDPE100S. These results demonstrate that PE⁃LD acts as an effective rheological modifier, improving the anti⁃sagging performance of HDPE100S without compromising its flowability during processing.

Key words: bimodal polyethylene, low density polyethylene, rheological behavior, anti?sagging performance, melting crystallization behavior

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