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.
全文連接：http://link.springer.com/article/10.1007/s10853-016-9820-z