Optical Properties of Regular Track-Etched Poly(ethylene terephthalate) Membranes

Fiodorov, V. A.; Vasiliev, A. B.; Nazmov, V.; Goldenberg, B. G.; Bedin, S. A.; Березкин, В. В.

doi:10.1134/s2517751619010037

Cited by 3 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polyethylene terephthalate (PET) films have been the subject of much study for a long time, both in their applied [1][2][3][4][5][6][7][8][9][10] and theoretical aspects [11][12][13][14][15][16][17]. A significant recent discovery [18,19] was that of ultrafast filtration with high selectivity by thin PET films irradiated with swift heavy ions, comparable to those for biological membranes.…”

Section: Introductionmentioning

confidence: 99%

Ion Charge Influence on the Molecular Structure of Polyethylene Terephthalate Films after Irradiation with Swift Heavy Ions

et al. 2020

View full text Add to dashboard Cite

We report here experimental results investigating the influence of the initial swift heavy ion charge on the structure of polyethylene terephthalate (PET) film after irradiation, using a structurally sensitive X-ray diffraction method. Kr ions with an energy of 100 MeV and charges of 13+, 14+, and 15+ were each used at irradiation fluences of 5 × 1010, 7.5 × 1010, 1 × 1011, 2.5 × 1011 and 5 × 1011 ions/cm2. At constant energy and irradiation fluence, the post-irradiation structural changes in PET film show a clear dependence on the initial ion charge. As either the fluence or ion charge increase, the latent tracks begin to overlap, leading to cross-linking of PET chain molecules to form rotational isomers (rotamers). We use the fluence corresponding to the onset of overlapping to estimate the size of latent tracks for different ion charges. At the highest fluences, the latent tracks become entirely overlapped, and the interchain cross-linking extends throughout the whole film. Since this cross-linking is due to the dipole–dipole interaction of subunits of repeat units of PET chain molecules, it is reversible, in contrast to the well-known chemical cross-linking of polymer chain molecules under irradiation.

show abstract