E-catalog        

Библиогр.: 24 назв.

The investigations of the surface physicochemical properties of polylactic acid (PLA) modified by argon, carbon and silver ion implantation to fluences of 1∙1014, 1∙1015 and 1∙1016 cm􀀀2 and energies of 20 keV, 20 keV and 42 keV respectively are described. The projected ion ranges in the polymer matrix are estimated by the computer simulation with the TRIDYN code, as well as energies of electron and nuclear stopping are assessed according to the SRIM modelling. The microhardness and elastic modulus are established to be dependent on the degree of crystallinity of the material. It was found that the microdistortions and strains of the PLA crystal lattice increase after ion implantation due to the structural alteration and defect formation. Long-range effect expressed as bigger depth of modified surface layer than the ion range in the material is suggested as a result of the radiation- stimulated diffusion and thermal restructuring of the material.