Processing and properties of modified polyamide 66-organoclay nanocomposites

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作者：
Mert, Miray [1 ]
Yilmazer, Ulku [1 ]
机构：
[1] Chemical Engineering Department, Middle East Technical University, 06531 Ankara, Turkey
来源：
| 1600年 / John Wiley and Sons Inc.卷 / 108期
关键词：
Binary polyamide 66 nanocomposites containing 2 wt % organoclay; polyamide 66 blend containing 5 wt % impact modifier; and ternary polyamide 66 nanocomposites containing 2 wt % organoclay and 5 wt % impact modifier were prepared by melt compounding method. The effects of E-GMA and the types of the organoclays on the interaction between the organoclay and the polymer; dispersion of the organoclay; morphology; mechanical; flow; and thermal properties of the nanocomposites were investigated. Partial exfoliation and improved mechanical properties are observed for Cloisite 15A and Cloisite 25A nanocomposites. On the other hand; the organoclay was intercalated or in the form of tactoids in Cloisite 30B nanocomposites. Components of the nanocomposites containing Cloisite 15A and Cloisite 25A were compounded in different addition orders. Mixing sequence of the components affected both the dispersion of the organoclay and the mechanical properties drastically. SEM analyses revealed that homogeneous dispersion of the organoclay results in a decrease in the domain sizes and promotes the improvements in the toughness of the materials. Melt viscosity was also found to have a profound effect on the dispersion of the organoclay according to MFI and XRD results. Crystallinity of the nanocomposites did not change significantly. It is only the type of the constituents and their addition order what dramatically influence the nanocomposite properties. © 2008 Wiley Periodicals; Inc;
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