Radiation softening and hardening of PDMS in combined neutron and γ rays

Durďáková, Tereza-Markéta; Hrdlička, Zdeněk; Král, Martin; Hovorka, Štěpán; Vögele, Alexander; Eichler, Robert; Trtik, Pavel; Vopička, Ondřej

doi:10.1016/j.polymdegradstab.2022.110241

Cited by 4 publications

(2 citation statements)

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“…Preparation and Characterization of Self-Sensitizing Radiochromic PUUEs. The γ-ray-sensitive DESN chain extender was synthesized by referencing previously reported procedures 35 (Figure S1a), and its related structural information was characterized by FTIR (Figure S1b) and 1 H NMR (400 MHz, DSMO-d 6 , ppm) (Figure S1c,d) spectra. In the FTIR spectra of the intermediate DESH, the peak at 1278 cm −1 is assigned to ν(−C−N−), and peaks at 3326, 3279, and 3178 cm −1 are attributed to asymmetric and symmetric stretching vibrations of −NH 2 and the stretching vibration of −NH−, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…γ-Irradiation, as one type of ionizing ray, possesses high energy and strong penetrating property, which is widely applied in industries of material processing, , sterilization, , purification, , radiotherapy, , and so on. Since γ-irradiation cannot be directly visually observed, special equipment is required to quantitatively detect it.…”

Section: Introductionmentioning

confidence: 99%

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Novel Radiochromic Elastomer Dosimeter Based on the Self-Sensitizing Effect of Disulfide Bonds

Wang,

Guo,

Zhang

2024

ACS Appl. Mater. Interfaces

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γ-Irradiation is a kind of high-energy ionizing ray, which has widespread applications in material, food, and medical industries as well as in the environment. Since this irradiation is invisible, quantitatively monitoring its exposure doses is crucial to irradiated targets. As a type of dosimeter, radiochromic dosimeters can detect γ-irradiation by color changing, and its strategy to realize the radiochromic behavior basically relies on active radicals from radiolysis of an external environmental medium. However, the primary problem of this external environment-mediated sensitization strategy is that it complicates the components of dosimeters. Herein, we present a novel type of self-sensitizing radiochromic poly(urethane-urea) elastomers (PUUEs), where disulfide bonds, serving as radiation-responsive and sensitizing units, are introduced. This is the first attempt to utilize radicals generated from radiolysis of weak bonds in a solid polymer matrix to sensitize color change of dye-doped radiochromic dosimeters. Moreover, it is intriguing that the simultaneously introduced aryl hydrazone bond endows dosimeters with excellent color retention and maintains the Δa* value of 72.9% even after 1 month on the basis of the as-irradiated specimen. Besides, the metathesis of disulfide bonds not only endows dosimeters with better self-healing capability, but also accelerates the postcuring behavior and hydrogen bond reconfiguration, resulting in improved mechanical performance.

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Section: Resultsmentioning

confidence: 99%