Abstract
The effect of gamma irradiation on the structure of ultra-high molecular weight poly(ethylene oxide) (UHMWPEO) has been investigated by small-angle x-ray scattering (SAXS). The pressed and irradiated polymer possesses quite strong diffuse scattering. That fact makes the direct determination of the main structural parameters very difficult. To solve the problem a modification of the standard evaluating methods is suggested. Thus, the separation of the porous scattering from that of structural formations of PEO becomes possible. The application of a collimation correction according to Schmidt's method enables to separate diffuse and discrete parts in the scattering. Dependences of the long period, the gyration radii, and the difference between densities of crystalline and amorphous phases on the irradiation dose show that the irradiation increases the density of amorphous areas. A packing of the lamellar aggregates and increase of the porous sizes are observed.
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Tsvetkova, S., Nedkov, E. Small angle x-ray scattering study of ultra-high molecular weight poly(ethylene oxide) gamma irradiated in bulk. Colloid Polym Sci 272, 903–909 (1994). https://doi.org/10.1007/BF00658888
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DOI: https://doi.org/10.1007/BF00658888