A shear-induced orientation extrusion technology was proposed to prepare high

orientated functional graphene oxide sheets (FGs)/isotactic polypropylene (iPP)

nanocomposites. Scanning electrical microscope and two-dimensional wideangle

X-ray diffraction techniques showed that FGs in iPP matrix were fully

exfoliated, uniformly dispersed, and highly oriented along the flow direction.

The crystallization behavior, the mechanical properties, the thermal stability,

and the gas barrier properties of the composites with orientated FGs were

evaluated by a differential scanning calorimetry, a tensile machine, a thermogravimetric

analysis, and a gas permeability test, respectively. The results

showed that the tensile strength, yield stress, Young’s modulus, thermal stability,

and barrier property of the iPP/FGs composites were improved on a

whole by increasing the high orientation, uniform dispersion, and full exfoliation

of FGs in the iPP matrix and the oriented crystallites of iPP as well as the

high crystallinity.

全文连接：http://link.springer.com/article/10.1007/s10853-016-9820-z