Abstract
12 MeV electron beams with different doses of 4, 8, 16 and 32 Mrad from LINAC designed by Nanjing University have been used to irradiate polypropylene films and their structures studied by X-ray diffraction afterwards. We have found that the electron irradiation does not change the total crystallinity of polypropylene but greatly inflences its crystal structure with increase of β phase and decrease of α phase as irradiation dose increases (within 16 Mrad). However, it is unexpected that the structure of irradiated sample with 32 Mrad are similar to that of the control sample. This behavior has also been observed in positron annihilation lifetime measurements.
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Wang, G.H., Li, X.Y., Lu, Y.Y. et al. Structural study of 12 MeV electron irradiated polypropylene by X-ray diffraction. Z. Physik B - Condensed Matter 65, 347–351 (1987). https://doi.org/10.1007/BF01303722
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DOI: https://doi.org/10.1007/BF01303722