Morphology and melt rheology of nylon 11/clay nanocomposites

被引：0
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作者：
He, Xiaofeng [1 ]
Yang, Jun [2 ]
Zhu, Lianchao [2 ]
Wang, Biao [1 ]
Sun, Guangping [1 ]
Lv, Pengfei [3 ]
Phang, In Yee [4 ]
Liu, Tianxi [5 ]
机构：
[1] College of Materials Science and Engineering, Jilin University, Changchun 130025, China
[2] Department of Polymeric Materials and Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
[3] Facility Division, Pingdingshan Institute of Technology, Pingdingshan 467001, China
[4] Department of Materials Science and Technology of Polymers, Faculty of Science and Technology, University of Twente, Ae Enschede, Netherlands
[5] Chinese Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
来源：
Journal of Applied Polymer Science | 2006年 / 102卷 / 01期
关键词：
Nylon 11 (PA11)/clay nanocomposites have been prepared by melt-blending; followed by melt-extrusion through a capillary. Transmission electron microscopy shows that the exfoliated clay morphology is dominant for low nanofiller content; while the intercalated one is prevailing for high filler loading. Melt rheological properties of P All nanocomposites have been studied in both linear and nonlinear viscoelastic response regions. In the linear regime; the nanocomposites exhibit much higher storage modulus (G′) and loss modulus (G″) values than neat P All. The values of G′ and G″ increase steadily with clay loading at low concentrations; while the G′ and G″ for the sample with 5 wt % clay show an inverse dependence and lie between the modulus values of the samples with 1 and 2 wt % of clay. This is attributed to the alignment/orientation of nanoclay platelets in the intercalated nanocomposite induced by capillary extrusion. In the nonlinear regime; the nanocomposites show increased shear viscosities when compared with the neat resin. The dependence of the shear viscosity on clay loading has analogous trend to that of G′ and G′. Finally; a comparison has been made between the complex and steady viscosities to verify the applicability of the empirical CoxMerz rule. © 2006 Wiley Periodicals; Inc;
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页码：542 / 549
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