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Effect of Steady Shear on Microstructural Evolution of Melt Intercalation of Polymer/Clay Nanocomposites. Journal of Applied Polymer Science, 2007, 105, 1740-1748.
作者:Defeng Wu, Chixing Zhou, Ming Zhang.
關鍵字:poly(butylene terephthalate); clay; composites; intercalation; kinetics.
論文來源:期刊
具體來源:Journal of Applied Polymer Science
發表時間:2007年

Journal of Applied Polymer Science, 2007, 105, 1740-1748.

ABSTRACT:

A sheet sample composed of poly(butylene terephthalate) (PBT) and clay prepared by solid-state compression was melt annealed in rheomoter under steady shear flow to investigate the whole hybridization process. The results of the off-line morphology and TGA as well as FTIR characterization show that shear flow can reduce the dynamic process of hybridization, facilitating the formation of intercalated nanoscale structure. With increase of shear intensity, the detachment level of clay increases more remarkably than that of swollen degree. However, increase of shear intensity will not induce the exfoliated structure but can decrease the average thickness of clay tactoids, leading to a remarkable enhancement in the thermal stability due to the increase of effective filling volume of clay. Furthermore, those intercalated nanocomposites annealed at high shear rate still present a distinct hierarchical structure, which suggests that the steady shear is not as good as that of the dynamic or complex shear to promote hybridization effectively.

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http://www3.interscience.wiley.com/journal/114205382/abstract

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