A fourier transform infrared spectroscopic investigation of polyethylene single crystals. I. Methylene wagging mode

The application of the spectral subtraction routine to the determination of the morphology of polyethylene single crystals is discussed in detail. An analysis of the CH2 methylene wagging mode is presented. A band at 1346 cm−1 is observed to be unique to polyethylene single crystals. The assignment of this band to a regular, tight fold structure is discussed.