Size characterization of ion tracks in PET and PTFE using SAXS

作者：Schauries D^*; Rodriguez M D; Afra B; Bierschenk T; Trautmann C; Mudie S; Kluth P

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2015, 365: 573-577.

DOI：10.1016/j.nimb.2015.08.071

• PET
• PTFE
• Ion irradiation
• Latent ion track
• Small angle X-ray scattering

Ion tracks in polyethylene terephthalate (PET) and polytetrafluoroethylene (PTFE) were created by swift heavy ion irradiation and subsequently characterized using small angle X-ray scattering (SAXS). Due to their reduced density compared to the surrounding matrix, cylindrical geometry, and parallel orientation, ion tracks produce a characteristic scattering pattern which allows quantitative analysis of their radius with high precision. For ion tracks in PET thermal annealing led to a gradual fading with a decrease in density difference yet a simultaneous increase in ion track radius. Such an increase in radius is the direct opposite compared to temperature induced ion track shrinking in inorganic materials, and suggests a very different thermal response of the polymer.

• 出版日期2015-12-15