An in situ small-angle X-ray scattering (SAXS) study of the structural effects of temperature and draw ratio (DR 1 ) of the hot-drawing process on ultra-high molecular weight polyethylene (UHMWPE) gel fibers was performed with equipment simulating the hot-drawing process on an industrial production line. The UHMWPE gel fibers were prepared from the industrial production line. The results show that the increase of hot-drawing temperature has a significant effect on the kebab but no obvious effect on shish length and misorientation. The increase of temperature is beneficial to the formation of the shish in a suitable temperature range of 124-130 C, while the formation of the shish at higher temperature, 140 C, needs higher DR 1 . Moreover, the increase of DR 1 is beneficial to the formation of shish at all experimental hotdrawing temperatures, while the kebab formation mainly occurs at low DR 1 and the kebab transformation mainly happens at high DR 1 . The shish length and misorientation decreases with the increase of DR 1 .
High density polyethylene (HDPE)/reduced graphene oxide (RGO) nanocomposite bars were prepared by injection molding and the effects of RGO on the HDPE matrix were investigated.
The
gel-spun ultrahigh molecular weight polyethylene (UHMWPE) fibers were
prepared at the industrial production line with different gel solution
concentration of 10–18 wt %. The effect of gel solution concentration
on the structure and performance of UHMWPE fibers was studied by tensile
testing, differential scanning calorimetry (DSC), wide-angle X-ray
diffraction (WAXD), and small-angle X-ray scattering (SAXS). With
the increase of gel solution concentration, the ultimate mechanical
properties of UHMWPE fibers decreased while the melting temperature
increased. And the increase of gel solution concentration made the
crystallization and orientation of UHMWPE fibers become worse. Furthermore,
the average length (⟨L
shish⟩)
and misorientation (B
ϕ) of shish
structure in UHMWPE fibers decreased with the increase of gel solution
concentration.
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