The high resolution transmission electron micrographs(HRTEM) of lamellar crystal of polyethylene(PE) obtained from the melt were successfully obtained by using high resolution electron microscopy,although PE is a relatively irradiation sensitive polymer.The HRTEM images with a clear one-dimensional structure(reported) here were recorded in a transmission electron microscope(TEM) operated at 200 kV.The spacing(between) the fringes was found to be 0.37 nm,which is close to the d-spacing of(200) plane. Micrographs image were processed by using optical filtering methods to improve the signal-to-noise ratio.
The crystal structure of 5-{[(4′-heptoxy-biphenylyl-4-yl)oxy]carbonyl}-1-pentyne({A3E′O7}) was investigated by wide angle X-ray diffraction(WAXD), transmission electron microscope(TEM) and atom force microscope(AFM). The structures of A3E′O7 solution-crystal and melt-crystal are the same. The crystals belong to the monoclinic P112/m space group, the cell parameters are {a0.589 nm}, b0^771 nm, c4.75 nm, αβ90° and γ93.8°, the calculated cell density is {1.167 g/cm+3}.
