Effect of clay on immiscible morphology of poly(butylene terephthalate)/polyethylene blend nanocomposites
Effect of clay on immiscible morphology of poly(butylene terephthalate)/polyethylene blend nanocomposites
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DOI：
10.1002/app.24088
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发表时间：
2006-11
影响因子：
3
通讯作者：
Defeng Wu;Chi-xing Zhou;M. Zhang
中科院分区：
文献类型：
--
作者：
Defeng Wu;Chi-xing Zhou;M. Zhang
Polymer blend nanocomposites containing poly(butylene terephthalate) (PBT), polyethylene (PE), and organoclay were prepared by direct melt compounding. Their immiscible morphologies weree investigated using electronmicroscopy, X-ray diffraction, and parallel plate rheometry. The PE domain sizes were reduced when the polar PBT phase was continuous (PBT/PE = 60/40) because the clay tactoids effectively prevented the coalescence of the dispersed PE domains. However, when the PBT component presented domains dispersed in the rich PE matrix (PBT/PE = 40/60), the addition of clay (>2 wt %) changed the phase morphology into a novel cocontinuous one, which was further confirmed by rheological measurements. The existence of clay tactoids led to a sharp enhancement in the viscosity of the PBT phase, changing the viscosity ratio between the PBT and PE phases remarkably, which may have promoted the phase inversion. As a result, clay had significant effects on the morphology of the polymer blend. © 2006 Wiley Periodicals Inc. J Appl Polym Sci 102: 3628–3633, 2006
