Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites

高等学校化学研究 ›› 2006, Vol. 22 ›› Issue (5): 651-657.doi:

Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites

YANG Hong-mei¹, ZHENG Qiang^1,2and DU Miao¹

1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China;
2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550025, P. R. China

收稿日期:2005-10-08 修回日期:1900-01-01 出版日期:2006-09-25 发布日期:2006-09-25
通讯作者: ZHENG Qiang E-mail:zhengqiang@zju.edu.cn

Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites

YANG Hong-mei¹, ZHENG Qiang^1,2and DU Miao¹

1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China;
2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550025, P. R. China

Received:2005-10-08 Revised:1900-01-01 Online:2006-09-25 Published:2006-09-25
Contact: ZHENG Qiang E-mail:zhengqiang@zju.edu.cn

摘要/Abstract

关键词: Rheological behavior, Nanocomposite, Polyethylene, Montmorillonite

Abstract: The viscoelastic properties of melts of nanocomposites with partially exfoliated structures, which were composed of low-density polyethylene (LDPE), ethylene vinyl acetate copolymer (EVA), and montmorillonite and modified by cetyltrimethyl ammonium bromide and octadecyltrimethyl ammonium bromide, were studied. The results obtained through measurements of the dynamic storage modulus G', the dynamic loss modulus G", and the transient stress relaxation modulus G(t) of the composites, reveal that the viscoelastic properties of the composites strongly depend on the amount of montmorillonite that is exfoliated into the composites. With the increase in montmorillonite content, the composites show an obvious property of pseudo solid-like materials within the region of lower frequencies (ω). The montmorillonite layers are aligned along the stress direction, and the dependence of dynamic modulus on ω, appears quite different for the composites before and after being exposed to a large amplitude oscillatory shears.

Key words: Rheological behavior, Nanocomposite, Polyethylene, Montmorillonite , Rheological behavior, Nanocomposite, Polyethylene, Montmorillonite

YANG Hong-mei , ZHENG Qiang , DU Miao . Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites[J]. 高等学校化学研究, 2006, 22(5): 651-657.

YANG Hong-mei , ZHENG Qiang , DU Miao . Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites
[J]. Chemical Research in Chinese Universities, 2006, 22(5): 651-657.

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Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites

Rheological Behavior of the Melts for Polyethylene-based Montmorillonite Nanocomposites

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