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Sensitized Radiation-Induced Polymerization of Indene with 1,1,2,2-Tetrachloroethane.

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Title: Sensitized Radiation-Induced Polymerization of Indene with 1,1,2,2-Tetrachloroethane.
Authors: Barzaga, Ransel1,2 (AUTHOR), García-Hernández, Domingo Aníbal1,2 (AUTHOR), Manchado, Arturo1,2,3 (AUTHOR), Di Sarcina, Ilaria4 (AUTHOR), Cemmi, Alessia4,5 (AUTHOR), Cataldo, Franco1,5 (AUTHOR) franco.cataldo@fastwebnet.it
Source: Polymers (20734360). Jun2025, Vol. 17 Issue 11, p1550. 14p.
Subjects: Polymerization kinetics, Addition polymerization, Chemical yield, X-ray spectroscopy, Gamma rays
Abstract: Sensitized radiation-induced polymerization of indene monomer was achieved at a dose rate of 3 kGy/h. The sensitizer (1,1,2,2-tetrachloroethane or TCE) leads to higher polyindene yields and faster polymerization kinetics with respect to bulk radiation-induced polymerization of indene. The radiation chemical yield Gp was found to increase with the dose in sensitized polymerization of indene following a power law, while an opposite trend was detected in the absence of the sensitizer. The sensitizer enhances the cationic polymerization mechanism in parallel to the free radical mechanism, as shown with both electronic absorption spectroscopy and FT–IR analysis of the polyindenes. Despite the enhancement of the polymer yield and the faster polymerization kinetics offered by the presence of TCE, the molecular weight of the resulting polyindene was found to be rather low. This was true whether the molecular weight was measured by end group analysis using X-ray fluorescence or the glass transition temperature determination with respect to the polyindenes produced with γ radiation without the sensitizer or with a pure cationic mechanism. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Sensitized Radiation-Induced Polymerization of Indene with 1,1,2,2-Tetrachloroethane.
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jun2025, Vol. 17 Issue 11, p1550. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Polymerization+kinetics%22">Polymerization kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Addition+polymerization%22">Addition polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+yield%22">Chemical yield</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+spectroscopy%22">X-ray spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Gamma+rays%22">Gamma rays</searchLink>
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  Data: Sensitized radiation-induced polymerization of indene monomer was achieved at a dose rate of 3 kGy/h. The sensitizer (1,1,2,2-tetrachloroethane or TCE) leads to higher polyindene yields and faster polymerization kinetics with respect to bulk radiation-induced polymerization of indene. The radiation chemical yield Gp was found to increase with the dose in sensitized polymerization of indene following a power law, while an opposite trend was detected in the absence of the sensitizer. The sensitizer enhances the cationic polymerization mechanism in parallel to the free radical mechanism, as shown with both electronic absorption spectroscopy and FT–IR analysis of the polyindenes. Despite the enhancement of the polymer yield and the faster polymerization kinetics offered by the presence of TCE, the molecular weight of the resulting polyindene was found to be rather low. This was true whether the molecular weight was measured by end group analysis using X-ray fluorescence or the glass transition temperature determination with respect to the polyindenes produced with γ radiation without the sensitizer or with a pure cationic mechanism. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/polym17111550
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        Text: English
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      – SubjectFull: Polymerization kinetics
        Type: general
      – SubjectFull: Addition polymerization
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      – SubjectFull: Chemical yield
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      – SubjectFull: X-ray spectroscopy
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              M: 06
              Text: Jun2025
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