Effect of flocculated structure on rheology of poly(butylene terephthalate)/clay nanocomposites

Journal of Polymer Science, Part B: Polymer Physics - Tập 43 Số 19 - Trang 2807-2818 - 2005
Defeng Wu1, Chixing Zhou1, Wei Yu1, Fan Xie1
1School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, Shanghai, China

Tóm tắt

AbstractThe microstructure and rheological property of poly(butylene terephthalate) (PBT)/epoxy/montmorillonite nanocomposites (PCNs) were investigated. For the study, PCNs were prepared by melt intercalation in clay content of 4 wt % and, epoxy loadings were varied from 2 to 4 wt %. The intercalated PCNs are characterized by different techniques such as transmission electron microscopy, Fourier transform infrared and rheology. It is interesting that the percolated tactoids network in the ternary hybrids becomes insensitive to the shear deformation with the addition of epoxy in contrast to that in the sample without epoxy, which can be attributed to the formation of a flocculated structure of clay tactoids because of the chain‐extension reactions between PBT matrix and epoxy and possible hydrogen bonding. The flocculated structure has influence on the rheological behavior of the hybrids remarkably, strengthening the percolated strong‐associated‐tactoids network and reducing the percolation threshold, while not changing the strain‐scaling. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 2807–2818, 2005

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Journal of Polymer Science, Part B: Polymer Physics

Tập 43 Số 19

2807-2818

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