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The conformation changes in PEO thin films were studied by means of FTIR-ATR. The results showed that there were some pronounced intensity changes of some bands in IR spectra of PEO thin films when the film thickness was changed. With the decrease of the thickness of the PEO films, the amount of the gauche conformation relative to the trans conformation of PEO crystal increased. This conformation change indicates PEO chains prefer to assume the helical structure near the surface of the substrate, which should be resulted from the interactions between PEO chains and the substrate. This suggests the possibility for using thickness to adjust PEO chains conformation in the crystalline area.
The conformation changes in PE of thin films were studied by means of FTIR-ATR. The results showed that there were some pronounced intensity changes of some bands in IR spectra of PEO thin films when the film thickness was changed. With the decrease of the thickness of the PEO films, the amount of the gauche conformation relative to the transconformation of PEO crystal increased. This conformation change indicates PEO chains prefer to assume the helical structure near the surface of the substrate, which should be resulted from the interactions between PEO chains and the substrate. This suggests the possibility for using thickness to adjust PEO chains conformation in the crystalline area.