A radiation-sensitive monomer of 2,4-hexadiyn-1,6-bis(p-toluene sulphonyl urethane) in PVA as a radiochromic film dosimeter
| Autor: | Aya Hamed, A.M.M. Bayomi, A.A. Abdel-Fattah, Y.S. Soliman |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Radiation Materials science Dosimeter 010308 nuclear & particles physics Polymer 010402 general chemistry 01 natural sciences Polyvinyl alcohol 0104 chemical sciences chemistry.chemical_compound Monomer chemistry Polymerization 0103 physical sciences Polymer chemistry Irradiation Fourier transform infrared spectroscopy Colorimetry Nuclear chemistry |
| Zdroj: | Radiation Physics and Chemistry. 144:56-62 |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2017.11.012 |
| Popis: | A conjugated monomer 2,4-hexadiyn-1,6-bis(p-toluene sulphonyl urethane) (HDTU) was synthesized. Thereafter, it was incorporated into polyvinyl alcohol (PVA), and coated on self-adhesive sheet, thus to prepare film dosimeters. The monomer and films were analyzed using X-ray diffraction (XRD), FTIR spectroscopy and specular reflectance colorimetry. This monomer polymerizes in the films by radiation and turns progressively blue in proportion to absorbed dose, indicating the formation of π-conjugated colored poly-HDTU. Color development was investigated at 480 nm and 610 nm for dose monitoring ranging from 10 Gy to 15 kGy. HDTU in PVA film is highly ordered and crystalline and, upon irradiation, it forms a semi-crystalline polymer with nearly the same interplanar distances as the monomer, indicating the occurrence of topochemical polymerization. During irradiation, polymerization of the monomer is nearly independent of humidity in the range of 0–53% and temperature in the range of 25–45 °C. The uncertainty of this system is 5.16% at 95% confidence level. |
| Databáze: | OpenAIRE |
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