中国塑料 ›› 2007, Vol. 21 ›› Issue (4): 31-34.

• 材料与性能 • 上一篇    下一篇

宽峰聚乙烯/蒙脱土纳米复合材料的制备与性能研究

年光南1,李海东1*,蔡洪光2,张春雨2,张学全2   

  1. 1.长春工业大学化学工程学院,吉林长春130012;2.中国科学院长春应用化学研究所,吉林长春130022
  • 出版日期:2007-04-26 发布日期:2021-05-10

Preparation and Properties of Broad Molecular Weight Distribution Polyethylene/MMT  Nanocomposite#br#

NIAN GUANG-nan1,LI HAI-dong1*,CAI HONG-guang2,ZHANG CHUN-yu2,ZHANG XUE-quan2   

  1. 1. Institute of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Online:2007-04-26 Published:2021-05-10

摘要: 制备出两种氢调敏感性的不同的催化剂,然后按照不同的比例混合,通过原位聚合法制备了宽峰聚乙烯纳米复合材料,分别表征和测定了其微观结构、分子结构参数和力学性能。结果表明:蒙脱土片层在乙烯聚合过程中发生了插层及剥离,以单片层或几层共存的形式纳米级分散于聚乙烯基体中;聚合物相对分子质量呈宽峰分布(Mw/Mn7.23);在熔体流动速率相近的情况下,复合材料的断裂伸长率提高到900%以上,拉伸强度达到40 MPa.

关键词: 宽峰聚乙烯, 原位聚合, 蒙脱土, 纳米复合材料, 力学性能

Abstract: Polyethylene with a broad molecular weight distribution was prepared using hybrid catalysts in presence of montmorillonite nanocomposites forming a composite in situ. The exfoliation of the layeyed silicates in the composites was confirmed by XRD and TEM observation.  The broad molecular weight distribution characteristic for the composites was revealed by the GPC profile (MW/Mn=7 .23),which was mainly due to different response to hydrogen regulation for active sites generated by hybrid catalysts. The composite gave rise to an elongation at break of 900%and a tensile strength of 40 MPa.

Key words: broad molecular weight distribution polyethylene, in situ polymerization, montmorillonite, nanocomposite, mechanical property

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