β Scribed by Tadokoro, Hiroyuki ;Tatsuka, Kiyoaki ;Murahashi, Shunsuke
No coin nor oath required. For personal study only.
Highly doubly oriented specimens of polyethylene terephthalate were studied by the methods of xβray diffraction and of infrared microspectroscopy. The sample for the microspectroscopy was embeded in nβbutyl methacrylate resin and cut perpendicularly to the stretching direction by a microtome. The spectra by the tilting method were also taken for the measurements of the pleochroism of the intense bands. Spectral measurements at various temperatures have been also made to obtain some additional information. It was confirmed that the molecular plane of the polymer (the plane of the benzene ring) is nearly parallel to the rolled plane. The assignments of the main bands are discussed.
π SIMILAR VOLUMES
With excitation by the light of the wavelengths longer than 320 nm, fluorescence spectra of polyethylene terephthalate (PET) films had somewhat different shapes from those excited below 300 nm through the intrinsic absorption of PET molecules. Also, in the measurements taken with a polarizer in fron