writer：Defeng Wu, Chixing Zhou, Ming Zhang.
keywords：clay; morphology; PBT; PE; nanocomposites.
source：期刊
specific source：Journal of Applied Polymer Science
Issue time：2006年

Journal of Applied Polymer Science, 2006, 102, 3628-3633.

ABSTRACT: Polymer blend nanocomposites containing poly (butylene terephthalate) (PBT), polyethylene (PE), and organoclay were prepared by direct melt compounding. Their immiscible morphologies were investigated using a scanning electron microscope (SEM) and an X-ray diffractometer (XRD) as well as the parallel plate rheometer. The existence of clay tactoids reduces the PE domains size when polar PBT phase is continuous (PBT/PE=60/40). However, when PBT component presents the domains dispersed in rich PE matrix (PBT/PE=40/60), addition of clay ( 2wt %) changes the phase morphology into a novel co-continuous one, which are further confirmed by the rheological measurements. As a result, clay has significant effects on the morphology of the polymer blend. The formation of the percolated clay tactoids network leads to a remarkable enhancement in viscosity, which mainly promotes the phase inversion.